New Circuits Page 21
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In 1896, Marconi successfully covered a distance of about 3 km using electromagnetic waves. A little later, he established radio contact across water between Lavernock Point, South Wales and Flat Holm Island. The transmitter consisted of a spark inductor....
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A 315bl excavator. Engine intermittently shut off on its own, but will start back up without a problem. Now machine will not shut off when key is off, happens every day now. I sometimes have to choke off air intake to shut down. most of the time the engine....
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Those pickups go to their own volume controls that are push/pull so I can coil tap them, and then onto a 5 way switch before going to the jack. To make it slightly more complex though, I`d like to put in a switch that determines whether the bridge is on or....
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A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and, by interrupting continuity, to immediately....
-
Perhaps we often see robots line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller, but in this article online follower robots in the design without using the microcontroller. For....
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Here is one simple circuit of a general-purpose white LED security light with Passive Infrared (PIR) Motion sensing mechanism. At the heart of the circuit is a PIR sensor module SB0061. SB0061 is a pyroelectric sensor module which developed for human body....
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Firecrackers are normally ignited by using a matchstick or a candle. You have to run away quickly after igniting the fuse of the firecracker. This method....
-
Bolometer systems would be simplified considerably if all components could be made photolithographically on a single substrate. We are developing a design for a single-substrate array with several frequency bands that incorporates a planar antenna for....
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V1 and V2 are 12AX7 dual triodes. Each half of V1 is wired as a Class A voltage amplifier in a configuration known as Common Cathode. By comparison, both halves of V2 are wired together in the Cathode Follower configuration for current gain. Don ’t freak....
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The telephone ring generator shown below generates the needed high voltage from a simple switching mode power supply (SMPS) which employs a CMOS Schmitt Trigger square wave oscillator, 10 mH inductor, high voltage switching transistor (TIP47 or other high....
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This circuit is a voltage-controlled oscillator, which is an oscillator whose frequency is determined by a control voltage. A 10 Hz sawtooth oscillator provides the control voltage in this case; this causes the frequency to rise slowly until it hits a....
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The time constant of R1C1 determines the low-cutoff frequency while the time constant of R2C2 determines the high cutoff frequency. The pass-band gain, Avpass=R2/R1. For a low-cut filter, that is a high-pass filter, Za must be capacitors and Zb resistors. By....
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Cellular phone detector circuit schematic using common electronic parts..
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According to current legislation in many countries, vintage cars must also be fitted with a fog lamp at the rear. In modern cars, there is a bit of circuitry associated with the fog lamp switch to prevent the fog lamp from going on when the lights are....
-
The design of the current application of the wider selection of VHDL hardware description language to realize the intersection traffic light system controller hardware circuit description, in the Altera`s MAX PLUS EDA software platform environment through....
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This Spy Pen FM Transmitter Circuit Can Be Built In A Ballpoint Pen. Crystal Controlled....
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Used a 12V motorcylce Battery and an ignition coil of a car. A microcontroller produces some pulses to the base of a 2N3055 transistor. 2N3055 turn on an off the primary of the coil and the desirable sound is produced between the probe and the surface. I....
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Here he adapts an ordinary 40 amp car relay, converting it from having a “normally open” contact, to operating with a “normally closed” contact. It is not necessary for you to do this as automotive relays with “normally closed” contacts are readily available....
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The three circuits above provide a constant current through the LED (or LEDs) when the supply rises to 15v and higher. The second and third circuits can be turned on and off via the input line. This is done by turning on the top transistor via the....
-
The schematic diagram below appears LM3909 Typical 1.5V Flasher circuit. It is known that LM3909 is an oscillator, a monolithic one, which is designed to flash Light Emitting Diodes (LED)..
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The circuit even has a current limiting feature which is a more reliable system than most commercial units have. The circuit uses 3 pass transistors which must be heat sink. Resistor R9 allows the fine tuning of the voltage to exactly 13. 8 volts and the....
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-
This circuit features automatic Exit and Entry delays and a timed Bell Cut-off. It has provision for both normally-closed and normally-open contacts, and a 24-hour Personal Attack/Tamper zone. It is connected permanently to the 12-volt supply and its....
-
-
The ZN459/CP used in this circuit is a high-gain low-noise preamplifier designed for audio/video applications at frequencies up to 15MHz. Figures 2-7B and 2-7C show typical PC board layouts for the ZN459 and ZN459CP (DIP), respectively. Figure 2-7D shows....
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Working on strowger phone exchanges involves a lot of soldering, but unlike modern electronics, you can`t use a fancy temperature controlled soldering station, with built in solder stand etc when you`re up a ladder. For one thing, you`ve usually only got a....
-
-
-
Even if a fluorescent tube it`s not a neon glow lamp and this page it`s not maybe at the right place, this circuit is very interesting because it uses an odd way to power a very common lamp. Like glow lamps, neon tubes are composed by two electrodes in a low....
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-
4 simple 12V power supply circuits with output voltages around 12V. First power supply circuit is built with BD139, one zener diode and a few passive components. Each of the schematic is very simple to construct and will function without problems if you....
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A 741 op amp is connected to a Wien-bridge, audio-sine-wave oscillator configuration, with C1, C2, R1, and R2 determining the circuit`s operating frequency. With the use of NPO capacitors and metal-film resistors, the oscillator`s frequency is stable enough....
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I have included two schematics, one is the circuit without a programming port and one includes a programming port....
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Stabilized DC Power Supply with Short-Circuit Indication. The circuit gives you four different regulated DC outputs (12V, 9V, 6V and 5V) and an unregulated 18V DC output, that are selectable by way of rotary switch S2. The selected output is showed on the....
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This charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA. At this time, a lower voltage is applied to finish off and keep from over charging. When the....
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Here is a simple but inexpensive inverter for using a small soldering iron (25W, 35W, etc) In the absence of mains supply. It uses eight transistors and a few resistors and capacitors. Transistors Q1 and Q2 (each BC547) form an astable multivibrator that....
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The objective of this project is to build an Arduino voice shield to empower thousands of voice related applications! All this mostly thanks to an integrated ISD1790PY chip. This particular voice/ TTS feature can be useful to integrate voice messages in....
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Bipolar digital multiplier has output polarity controlled by offset-binary-coded digital input word. Precision Monolithics DAC-08 D/A converter drives OP-02 opamp. 0utput is symmetrical about ground. -J. Schoeff and D. Soderquist, Differential and....
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Tired of always being snuck up upon? Doing any stealth surveillance or reconnaissance? Or maybe you just need to set-up a fail-safe alarm for your stu....
-
What`s so special Well, first of all - a very low harmonic distortion. Usually, manufacturers indicate the maximum power of its regular ingenious handicrafts with the harmonic content of 10%. At the same chip, CT at the maximum specified power is only 0, 5%!....
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MM5314 a monolithic MOS integrated circuit that utilizes P-channel low threshold, enhancement mode and ion planted, depletion mode devices which has features such as internal multiplex oscillator, fast and slow set controls, single power supply, 7-segment....
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IRF9540N Gate Charge Test Circuitis schemed in the diagram below. IRF9540N is known to be rectifier device with advanced processing techniques to achieve extremely low on resistance per silicon area, according to the datasheet. Other thanGate Charge Test....
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This scheme is for 4 cylinder motor. This will make your car spent less fuel, be a little bit faster and you wont have to frequently open your distributor cap to change the contact buttons thus wasting less money. T1/T2 create one monostable multivibrator in....
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Stepper motors find lots of applications in process control, machine tools and robotics. Especially in robotics and process control, bit is necessary to control the stepper motor from a remote place. Here you will get the transmitter and receiver circuit....
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Commander allows you to control your Alinco, Elecraft, Flexradio, Icom, JRC, Kachina, Kenwood, TenTec, or Yaesu radio from a PC running Windows 95, 98, NT, 2000, XP, Vista, 7, or 8; both 32-bit and 64-bit flavors of Windows are supported. Commander is free,....
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22W into 4 Ohm power amplifier, Variable Low Pass Frequency: 70 150Hz This unit is intended to be connected to an existing car stereo amplifier, adding....
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New design techniques in LED driver circuits promise to deliver significant energy savings that will go a long way toward helping TV manufacturers meet the tough requirements for power consumption....
-
In order to measure the RMS value of an alternating voltage an accurate converter is required to produce the true RMS value of its alternating input as a DC output. With simple sine-wave inputs the RMS voltage can simply be calculated as 0. 707 times the....
-
The ability amp lath has remained banausic back it was aboriginal appear in 2002. It absolutely isn`t broken, so there`s no acumen to fix it. The photo beneath shows a absolutely accumulated lath (available as apparent as M27). Application TIP35/36C....
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A very simple dual 15 volts power supply electronic circuit project can be designed using the LT3512 switching regulator IC manufactured by Linear Technology. This simple 15 volts DC power supply electronic project operates from an input voltage range of 36....
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Have you ever seen the stairs to one of the upper stories in your house turn into a waterfall Or maybe you`ve come home to find your aquarium fish trying to swim across the carpet For your sake, we hope not, because the consequences are usually fairly....
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These relatively simple circuits can be used to transmit information across a small distance. The "information" I normally use is music from a radio, iPod or CD player - you could also try a microphone and amplifier. People transmit information all the time....
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To build astepper motor tester, the circuit contains two sets of drivers that can support both unipolar and bipolar stepper motors. The control circuit and driver circuit are in separate power supplies that can work on a wider rangeof different power....
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The system regards DSP56F826 chip as the key control module, uses the sensory chip of CMOS digital image, reachable 640* 480 picture element of definition that the picture is gathered. When needing the vision which carries on the high-resolution to be....
-
Simple resistor, diode combinations trigger and control SCRs over the full 180 electrical degree range, performing well at commercial temperatures. These types of circuits operate most satisfactorily when SCRs have fairly strong gate sensitivities. Since in....
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The figure adopts the controller as the capital equipment that digital quantity is gathered and controlled in the on-the-spot monitor system, the stability of the on-the-spot control work to the overall system of its characteristic has very important....
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One day on the 50MHz SSB-QSO, my friends JE3TXU/1 (Mr. Haraguchi) sad to me that he made 50MHz very small transceiver. I said to him that he shall inform about it on the Japanease CQ magazine. You can see about it on the book. See the photo! This rig is made....
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Experimenting with the window motor. The reason the window motor is so powerful, is the minor current required is an INDEPENDENT VARIABLE from the power of the permanent magnets on the rotors. The true power lies in the magnetic flux lines of the permanent....
-
An alternative to the infamous ROG `s Ruby amp. As you see it shares with the Ruby the same topology: a buffer and a chip amp. It uses a JFET buffer with a MPF102 and the 1W TDA7052 chip. It is a clean amp and it reacts very well with any pedal in front of....
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The ELM622 by ELM Electronics is a preprogrammed PIC which converts commands from a Sony infrared remote control into a serial data stream. An IR receiver using a ELM622 requires no kernel modifications. This project shows how to build a Linux IR receiver....
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Results are shown on an analog VSWR meter. The design was originally published in `Break-In`, New Zealand`s amateur radio magazine in Sept/Oct 2005, and is republished here with the permission of the editor. Note: `Break-In` is a term used in amateur radio....
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Hi and welcome to my first instructable! I`m going to show you how to make your own low-power wireless charging circuits that will let you pass elect....
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Interface an LED with AVR (ATMega16). Here I am using only one AVR microcontroller ATMega16, one register(10K), one capacitor(16uF/25v), One push button switch, Led BAR Green in stead of 8 led`s, power supply of +5v and -5v. Make the circuit as in diagram.....
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Using a single 555 Timer IC and a small transformer to generate a high voltage, this circuit will test zener diodes of voltage ratings up to 50VDC. The 555 timer is used in the astable mode, the output at pin3 drives a small audio transformer such as the....
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Completely safe operation is guaranteed due to protection against DC and AC short circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground. ..
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This is how to make a trimet. The parts you need are: 3 Capacitors, a 2N3904, a 2N3906, a resistor(1k to 10k ohm), a solar cell (minimum 3 volts),....
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This is a design circuit for high frequency waveform generator is very useful in electronic experiment and design. This circuit is generate sine wave oscillation, but actually we can modify the circuit to generate triangle or square wave function. Th ....
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By using a potentiometer, R2, as one of the resistors you can dial up the output voltage wanted. Either AC or DC input can be supplied to the Kit via a socket or terminal block. When external capacitors are used with any IC regulator it is good practice to....
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Telephone electronic ringer circuit is shown as above,Figure (a) is the electronic ring circuit with an NPN transistor V1 (choose 9014 or 3DG12) as the core, sound devices YD is also feedback devices composed of the feedback pole and the buzzer equipped with....
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This circuit shows an ICL7106 connected with a silicon transistor to form a digital thermometer. Direct connections between the ICL7106 and an LCD display are shown in Fig. 12-11B. A diode-connected silicon transistor has a temperature coefficient of about....
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The simple circuit produces simple audible alarm like notification of sound, used as burglar alarm using five transistor...
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This is a audio-controlled lamp circuit. This circuit requires low voltage input such as pre-amplifiers, tone control, or general audio line level output. It`s...
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The following is a main circuit of the mixer-6 Ch The circuit consists of six input channels. The mono channels are channels 1-4 and 5-6 CH CH, are intended for use by music. The number of input channels you want as she can greatly increase you want. The....
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The circuit illustrated here comes to the rescue by sniffing out defective bulbs by capacitively sensing the electric fields they produce ( see the figure ). To understand how it works, consider a string of bulbs with an opencircuited filament, labeled in....
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UART, GPs This application note shows how to combine a GPs module SC16C2552B into a navigation system by using a Philips UART With the rapid development of GPs (Global Positioning System) techniques, GPs gets wider application in many fields. GPs has....
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This 3V FM transmitter Circuit is about the simplest and best basal transmitter to body and accept a advantageous transmitting range. It is decidedly able admitting its baby basic calculation and 3V operating voltage. It will calmly access over three floors....
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This page describes the development of electronics to display a monochrome video image on an electrostatic oscilloscope tube. This work is complementary to the Electron Optics page in the Experiments section. The ultimate goal is to display a moving video....
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The first BC109C transistor (left hand side) is acting as a buffer. It provides the circuit with a high input impedance, around 250k has a voltage gain of slightly less than unity. As the Baxendall tone control circuit is a passive design, all audio....
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This 2 channels audio mixer is based on the 2n3904 transistors which forms 2 preamplifiers. The first preamplifier of the audio mixer has a high gain and can be used for microphone input, and the second one can be used to control the input of the audio....
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A simple NiCd charger can be built using junk box` components and an inexpensive LM317 or 78xx voltage regulator. Using a current limiter composed of R3 and a transistor, it can charge as many cells as desired until a fully charged` voltage determined by the....
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At present, the switching power supply is with its high performance, high efficiency 75%, the switching power supply efficiency of the single scale integration has already been more than 90% now, This pair solves the energy problem and plays a role in adding....
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The purpose of this report is to provide background and findings or our senior project. We will discuss four steps that we used to complete our final project. The four steps of our project were research and development, design, construction, and test &....
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The circuit diagram of stereo PLL FM transmitter based BH1417 chip. This is certainly the most recent BH1417 FM Transmitter design diagram from RHOM that consists of lots of capabilities in a single tiny package. It includes pre-emphasis, limiter to ensure....
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Experiments with couple of floppy drives I have and it appears that on the step pin, current is limited to around 5 mA. This means that we can indeed omit the collector resistor in this case. For base, I`d recommend a 1 kiloohm resistor. This will give us 3.....
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The Command radio is a description of the radio function, rather than a specific model. The "Command" function was to communicate between aircraft. The "Liaison" function was to communicate back to base. However, functions often become blurred in use, and....
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This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low voltage, low drain battery operation and small size, the device is suitable for mounting on bicycles....
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LPG gas is supplied in pressurized steel cylinders. As this gas is heavier than air, when it leaks from a cylinder it flows along floor and tends to settle in low spots such as a basement. This can cause fire or suffocation if not dealt with. Here is a....
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A few months ago Milardo starting to study the 8051 Microcontroller. From his research Miardo has designed a new circuit and called it 3-Digit Display Scoreboard with 4x4 Keypad Matrix....
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Optical toggle switch using a single Chip. Using dual flip-flop IC CD4027 employ a 555 based monostable circuit to supply input clock pulses. The circuit described here obviates this requirement. One...
In 1896, Marconi successfully covered a distance of about 3 km using electromagnetic waves. A little later, he established radio contact across water between Lavernock Point, South Wales and Flat Holm Island. The transmitter consisted of a spark inductor....
A 315bl excavator. Engine intermittently shut off on its own, but will start back up without a problem. Now machine will not shut off when key is off, happens every day now. I sometimes have to choke off air intake to shut down. most of the time the engine....
Those pickups go to their own volume controls that are push/pull so I can coil tap them, and then onto a 5 way switch before going to the jack. To make it slightly more complex though, I`d like to put in a switch that determines whether the bridge is on or....
A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and, by interrupting continuity, to immediately....
Perhaps we often see robots line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller, but in this article online follower robots in the design without using the microcontroller. For....
Here is one simple circuit of a general-purpose white LED security light with Passive Infrared (PIR) Motion sensing mechanism. At the heart of the circuit is a PIR sensor module SB0061. SB0061 is a pyroelectric sensor module which developed for human body....
Firecrackers are normally ignited by using a matchstick or a candle. You have to run away quickly after igniting the fuse of the firecracker. This method....
Bolometer systems would be simplified considerably if all components could be made photolithographically on a single substrate. We are developing a design for a single-substrate array with several frequency bands that incorporates a planar antenna for....
V1 and V2 are 12AX7 dual triodes. Each half of V1 is wired as a Class A voltage amplifier in a configuration known as Common Cathode. By comparison, both halves of V2 are wired together in the Cathode Follower configuration for current gain. Don ’t freak....
The telephone ring generator shown below generates the needed high voltage from a simple switching mode power supply (SMPS) which employs a CMOS Schmitt Trigger square wave oscillator, 10 mH inductor, high voltage switching transistor (TIP47 or other high....
This circuit is a voltage-controlled oscillator, which is an oscillator whose frequency is determined by a control voltage. A 10 Hz sawtooth oscillator provides the control voltage in this case; this causes the frequency to rise slowly until it hits a....
The time constant of R1C1 determines the low-cutoff frequency while the time constant of R2C2 determines the high cutoff frequency. The pass-band gain, Avpass=R2/R1. For a low-cut filter, that is a high-pass filter, Za must be capacitors and Zb resistors. By....
Cellular phone detector circuit schematic using common electronic parts..
According to current legislation in many countries, vintage cars must also be fitted with a fog lamp at the rear. In modern cars, there is a bit of circuitry associated with the fog lamp switch to prevent the fog lamp from going on when the lights are....
The design of the current application of the wider selection of VHDL hardware description language to realize the intersection traffic light system controller hardware circuit description, in the Altera`s MAX PLUS EDA software platform environment through....
This Spy Pen FM Transmitter Circuit Can Be Built In A Ballpoint Pen. Crystal Controlled....
Used a 12V motorcylce Battery and an ignition coil of a car. A microcontroller produces some pulses to the base of a 2N3055 transistor. 2N3055 turn on an off the primary of the coil and the desirable sound is produced between the probe and the surface. I....
Here he adapts an ordinary 40 amp car relay, converting it from having a “normally open” contact, to operating with a “normally closed” contact. It is not necessary for you to do this as automotive relays with “normally closed” contacts are readily available....
The three circuits above provide a constant current through the LED (or LEDs) when the supply rises to 15v and higher. The second and third circuits can be turned on and off via the input line. This is done by turning on the top transistor via the....
The schematic diagram below appears LM3909 Typical 1.5V Flasher circuit. It is known that LM3909 is an oscillator, a monolithic one, which is designed to flash Light Emitting Diodes (LED)..
The circuit even has a current limiting feature which is a more reliable system than most commercial units have. The circuit uses 3 pass transistors which must be heat sink. Resistor R9 allows the fine tuning of the voltage to exactly 13. 8 volts and the....
This circuit features automatic Exit and Entry delays and a timed Bell Cut-off. It has provision for both normally-closed and normally-open contacts, and a 24-hour Personal Attack/Tamper zone. It is connected permanently to the 12-volt supply and its....
The ZN459/CP used in this circuit is a high-gain low-noise preamplifier designed for audio/video applications at frequencies up to 15MHz. Figures 2-7B and 2-7C show typical PC board layouts for the ZN459 and ZN459CP (DIP), respectively. Figure 2-7D shows....
Working on strowger phone exchanges involves a lot of soldering, but unlike modern electronics, you can`t use a fancy temperature controlled soldering station, with built in solder stand etc when you`re up a ladder. For one thing, you`ve usually only got a....
Even if a fluorescent tube it`s not a neon glow lamp and this page it`s not maybe at the right place, this circuit is very interesting because it uses an odd way to power a very common lamp. Like glow lamps, neon tubes are composed by two electrodes in a low....
4 simple 12V power supply circuits with output voltages around 12V. First power supply circuit is built with BD139, one zener diode and a few passive components. Each of the schematic is very simple to construct and will function without problems if you....
A 741 op amp is connected to a Wien-bridge, audio-sine-wave oscillator configuration, with C1, C2, R1, and R2 determining the circuit`s operating frequency. With the use of NPO capacitors and metal-film resistors, the oscillator`s frequency is stable enough....
I have included two schematics, one is the circuit without a programming port and one includes a programming port....
Stabilized DC Power Supply with Short-Circuit Indication. The circuit gives you four different regulated DC outputs (12V, 9V, 6V and 5V) and an unregulated 18V DC output, that are selectable by way of rotary switch S2. The selected output is showed on the....
This charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA. At this time, a lower voltage is applied to finish off and keep from over charging. When the....
Here is a simple but inexpensive inverter for using a small soldering iron (25W, 35W, etc) In the absence of mains supply. It uses eight transistors and a few resistors and capacitors. Transistors Q1 and Q2 (each BC547) form an astable multivibrator that....
The objective of this project is to build an Arduino voice shield to empower thousands of voice related applications! All this mostly thanks to an integrated ISD1790PY chip. This particular voice/ TTS feature can be useful to integrate voice messages in....
Bipolar digital multiplier has output polarity controlled by offset-binary-coded digital input word. Precision Monolithics DAC-08 D/A converter drives OP-02 opamp. 0utput is symmetrical about ground. -J. Schoeff and D. Soderquist, Differential and....
Tired of always being snuck up upon? Doing any stealth surveillance or reconnaissance? Or maybe you just need to set-up a fail-safe alarm for your stu....
What`s so special Well, first of all - a very low harmonic distortion. Usually, manufacturers indicate the maximum power of its regular ingenious handicrafts with the harmonic content of 10%. At the same chip, CT at the maximum specified power is only 0, 5%!....
MM5314 a monolithic MOS integrated circuit that utilizes P-channel low threshold, enhancement mode and ion planted, depletion mode devices which has features such as internal multiplex oscillator, fast and slow set controls, single power supply, 7-segment....
IRF9540N Gate Charge Test Circuitis schemed in the diagram below. IRF9540N is known to be rectifier device with advanced processing techniques to achieve extremely low on resistance per silicon area, according to the datasheet. Other thanGate Charge Test....
This scheme is for 4 cylinder motor. This will make your car spent less fuel, be a little bit faster and you wont have to frequently open your distributor cap to change the contact buttons thus wasting less money. T1/T2 create one monostable multivibrator in....
Stepper motors find lots of applications in process control, machine tools and robotics. Especially in robotics and process control, bit is necessary to control the stepper motor from a remote place. Here you will get the transmitter and receiver circuit....
Commander allows you to control your Alinco, Elecraft, Flexradio, Icom, JRC, Kachina, Kenwood, TenTec, or Yaesu radio from a PC running Windows 95, 98, NT, 2000, XP, Vista, 7, or 8; both 32-bit and 64-bit flavors of Windows are supported. Commander is free,....
22W into 4 Ohm power amplifier, Variable Low Pass Frequency: 70 150Hz This unit is intended to be connected to an existing car stereo amplifier, adding....
New design techniques in LED driver circuits promise to deliver significant energy savings that will go a long way toward helping TV manufacturers meet the tough requirements for power consumption....
In order to measure the RMS value of an alternating voltage an accurate converter is required to produce the true RMS value of its alternating input as a DC output. With simple sine-wave inputs the RMS voltage can simply be calculated as 0. 707 times the....
The ability amp lath has remained banausic back it was aboriginal appear in 2002. It absolutely isn`t broken, so there`s no acumen to fix it. The photo beneath shows a absolutely accumulated lath (available as apparent as M27). Application TIP35/36C....
A very simple dual 15 volts power supply electronic circuit project can be designed using the LT3512 switching regulator IC manufactured by Linear Technology. This simple 15 volts DC power supply electronic project operates from an input voltage range of 36....
Have you ever seen the stairs to one of the upper stories in your house turn into a waterfall Or maybe you`ve come home to find your aquarium fish trying to swim across the carpet For your sake, we hope not, because the consequences are usually fairly....
These relatively simple circuits can be used to transmit information across a small distance. The "information" I normally use is music from a radio, iPod or CD player - you could also try a microphone and amplifier. People transmit information all the time....
To build astepper motor tester, the circuit contains two sets of drivers that can support both unipolar and bipolar stepper motors. The control circuit and driver circuit are in separate power supplies that can work on a wider rangeof different power....
The system regards DSP56F826 chip as the key control module, uses the sensory chip of CMOS digital image, reachable 640* 480 picture element of definition that the picture is gathered. When needing the vision which carries on the high-resolution to be....
Simple resistor, diode combinations trigger and control SCRs over the full 180 electrical degree range, performing well at commercial temperatures. These types of circuits operate most satisfactorily when SCRs have fairly strong gate sensitivities. Since in....
The figure adopts the controller as the capital equipment that digital quantity is gathered and controlled in the on-the-spot monitor system, the stability of the on-the-spot control work to the overall system of its characteristic has very important....
One day on the 50MHz SSB-QSO, my friends JE3TXU/1 (Mr. Haraguchi) sad to me that he made 50MHz very small transceiver. I said to him that he shall inform about it on the Japanease CQ magazine. You can see about it on the book. See the photo! This rig is made....
Experimenting with the window motor. The reason the window motor is so powerful, is the minor current required is an INDEPENDENT VARIABLE from the power of the permanent magnets on the rotors. The true power lies in the magnetic flux lines of the permanent....
An alternative to the infamous ROG `s Ruby amp. As you see it shares with the Ruby the same topology: a buffer and a chip amp. It uses a JFET buffer with a MPF102 and the 1W TDA7052 chip. It is a clean amp and it reacts very well with any pedal in front of....
The ELM622 by ELM Electronics is a preprogrammed PIC which converts commands from a Sony infrared remote control into a serial data stream. An IR receiver using a ELM622 requires no kernel modifications. This project shows how to build a Linux IR receiver....
Results are shown on an analog VSWR meter. The design was originally published in `Break-In`, New Zealand`s amateur radio magazine in Sept/Oct 2005, and is republished here with the permission of the editor. Note: `Break-In` is a term used in amateur radio....
Hi and welcome to my first instructable! I`m going to show you how to make your own low-power wireless charging circuits that will let you pass elect....
Interface an LED with AVR (ATMega16). Here I am using only one AVR microcontroller ATMega16, one register(10K), one capacitor(16uF/25v), One push button switch, Led BAR Green in stead of 8 led`s, power supply of +5v and -5v. Make the circuit as in diagram.....
Using a single 555 Timer IC and a small transformer to generate a high voltage, this circuit will test zener diodes of voltage ratings up to 50VDC. The 555 timer is used in the astable mode, the output at pin3 drives a small audio transformer such as the....
Completely safe operation is guaranteed due to protection against DC and AC short circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground. ..
This is how to make a trimet. The parts you need are: 3 Capacitors, a 2N3904, a 2N3906, a resistor(1k to 10k ohm), a solar cell (minimum 3 volts),....
This is a design circuit for high frequency waveform generator is very useful in electronic experiment and design. This circuit is generate sine wave oscillation, but actually we can modify the circuit to generate triangle or square wave function. Th ....
By using a potentiometer, R2, as one of the resistors you can dial up the output voltage wanted. Either AC or DC input can be supplied to the Kit via a socket or terminal block. When external capacitors are used with any IC regulator it is good practice to....
Telephone electronic ringer circuit is shown as above,Figure (a) is the electronic ring circuit with an NPN transistor V1 (choose 9014 or 3DG12) as the core, sound devices YD is also feedback devices composed of the feedback pole and the buzzer equipped with....
This circuit shows an ICL7106 connected with a silicon transistor to form a digital thermometer. Direct connections between the ICL7106 and an LCD display are shown in Fig. 12-11B. A diode-connected silicon transistor has a temperature coefficient of about....
The simple circuit produces simple audible alarm like notification of sound, used as burglar alarm using five transistor...
This is a audio-controlled lamp circuit. This circuit requires low voltage input such as pre-amplifiers, tone control, or general audio line level output. It`s...
The following is a main circuit of the mixer-6 Ch The circuit consists of six input channels. The mono channels are channels 1-4 and 5-6 CH CH, are intended for use by music. The number of input channels you want as she can greatly increase you want. The....
The circuit illustrated here comes to the rescue by sniffing out defective bulbs by capacitively sensing the electric fields they produce ( see the figure ). To understand how it works, consider a string of bulbs with an opencircuited filament, labeled in....
UART, GPs This application note shows how to combine a GPs module SC16C2552B into a navigation system by using a Philips UART With the rapid development of GPs (Global Positioning System) techniques, GPs gets wider application in many fields. GPs has....
This 3V FM transmitter Circuit is about the simplest and best basal transmitter to body and accept a advantageous transmitting range. It is decidedly able admitting its baby basic calculation and 3V operating voltage. It will calmly access over three floors....
This page describes the development of electronics to display a monochrome video image on an electrostatic oscilloscope tube. This work is complementary to the Electron Optics page in the Experiments section. The ultimate goal is to display a moving video....
The first BC109C transistor (left hand side) is acting as a buffer. It provides the circuit with a high input impedance, around 250k has a voltage gain of slightly less than unity. As the Baxendall tone control circuit is a passive design, all audio....
This 2 channels audio mixer is based on the 2n3904 transistors which forms 2 preamplifiers. The first preamplifier of the audio mixer has a high gain and can be used for microphone input, and the second one can be used to control the input of the audio....
A simple NiCd charger can be built using junk box` components and an inexpensive LM317 or 78xx voltage regulator. Using a current limiter composed of R3 and a transistor, it can charge as many cells as desired until a fully charged` voltage determined by the....
At present, the switching power supply is with its high performance, high efficiency 75%, the switching power supply efficiency of the single scale integration has already been more than 90% now, This pair solves the energy problem and plays a role in adding....
The purpose of this report is to provide background and findings or our senior project. We will discuss four steps that we used to complete our final project. The four steps of our project were research and development, design, construction, and test &....
The circuit diagram of stereo PLL FM transmitter based BH1417 chip. This is certainly the most recent BH1417 FM Transmitter design diagram from RHOM that consists of lots of capabilities in a single tiny package. It includes pre-emphasis, limiter to ensure....
Experiments with couple of floppy drives I have and it appears that on the step pin, current is limited to around 5 mA. This means that we can indeed omit the collector resistor in this case. For base, I`d recommend a 1 kiloohm resistor. This will give us 3.....
The Command radio is a description of the radio function, rather than a specific model. The "Command" function was to communicate between aircraft. The "Liaison" function was to communicate back to base. However, functions often become blurred in use, and....
This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low voltage, low drain battery operation and small size, the device is suitable for mounting on bicycles....
LPG gas is supplied in pressurized steel cylinders. As this gas is heavier than air, when it leaks from a cylinder it flows along floor and tends to settle in low spots such as a basement. This can cause fire or suffocation if not dealt with. Here is a....
A few months ago Milardo starting to study the 8051 Microcontroller. From his research Miardo has designed a new circuit and called it 3-Digit Display Scoreboard with 4x4 Keypad Matrix....
Optical toggle switch using a single Chip. Using dual flip-flop IC CD4027 employ a 555 based monostable circuit to supply input clock pulses. The circuit described here obviates this requirement. One...
