New Circuits Page 135
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The heart of the switch controller is an Arduino Nano micro-controller - this is going to be the interface between the dashboard switches, wireless steering wheel buttons and the car`s lighting, indicators, windscreen wipers and DigiDash2 GPS stopwatch. This....
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Build a logic level shifter (that`s what it`s called) with a few discrete components (transistors and resistors) or you can go for a one-component solution, i. e. an IC. Most ICs won`t accept input voltages as low as 1. 4 V, but I found Fairchild`s FXLP34....
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This LM12 audio amplifier circuit will provide a high output power on a 8 ohms or 4 ohms load impedance. The maximum output power delivered by this LM12 audio amplifier is around 60 watts on a 4 ohms load and 100 watts on a 4 ohms load on each channel. A....
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The circuit takes Vin, passes it through a SMPS with two MOSFETS (driven by the ir2104 that dies) and into Bat+. The LM321 is just a latch that allow the MCU to control and read the ir2104). The connector in the left comes from the MCU, the right one holds....
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This is a design circuit for temperature to digital converter circuit that is based control by LM35 IC. This LM35 is precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperatu ....
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This small circuit is ideal for checking the basic operation of an infrared remote control unit. The circuit is based on the brilliantly simple idea of connecting a piezo buzzer directly to an IR receiver IC. This method is almost as simple as connecting a....
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Chevy S-10 Blazer Ignition Control (IC) Circuit Wiring Diagram...
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The A/D converter employs dual-slope integrator providing 10Hz sampling rate, while Digital output sent to MCU will be multiplexing four bit BCD started from MSD, LSD and NSD respectively...
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-
Small digital design using a Xilinx picoblaze softcore processor, and I`m finding that producing schematics of acceptable quality to be frustrating and time consuming. I`ve attempted to shoehorn previously drawn schematics (From LTSpice, or Eagle) into....
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Its basic function is frequency and cycle of the measuring signal, the application of the frequency counter is in a very large range, it is not merely applied to general simple instrument measurement, and apply to other fields such as teaching, scientific....
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A number of ham radio operators have made their start on the 10 GHz amateur band using commercial-surplus microwave transceivers made by M/A-Com. These units were originally built in white-painted metal enclosures and are known as "White Boxes" They can be....
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Renewable Energy Discussion on various alternative energy, renewable energy, & free energy technologies. Also any discussion about the environment, global warming, and other related topics are welcome here. I will just mention a few things in here which....
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The heart of this diy metal detector circuit is the CS209A IC. The metal detector is built with one 100µH coil that has 40 mm in diameter and is made....
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Making your own universal remote control systems today is very easy. Such procure the relevant chips, assemble them and here goes, your hi-tech remote control device is working for you. Here we explain a couple remote control chips especially designed for....
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This application notes describes how the MAX4929E takes care of switching all low frequency signals (LoF) needed for a 2:1 HDMI/DVI switch while adding high level ESD protection to all outside lines, and how MAX4929E mates with an EDID EPROM, accepting 5V....
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The following circuit shows about 1.5 V Lead-Acid Battery Charger Circuit Diagram. Features: comparator s output controls the voltage regulator, ....
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The triac should flip on and the light and it should be at nearly 100% brighness. However, this is not what`s happening. Itstead, the light doesn`t turn on at all. Can anyone explain why this might be If I change the gate to be always triggered (i. e. always....
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We expect oscillation at the resonant frequency at which the positive feedback is at 0 degrees (in phase) with the input. For oscillation to occur, the gain has to be at least 1 at that frequency. Kaz Oct 30 `12 at 20:39 I still think the 10u cap has wrong....
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The photoflash circuit is showed as above. The seagulls SD - 150 type studio flash combines formative light and photography intense light source also accompanied by advanced synchronous remote control device of inside light modulation, which makes many....
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To convert a standard LCD interface parallel to serial interface model, use a microcontroller or a dedicated circuit such as the MIC 702 Mictronics you can download the complete data sheet and French by clicking this link. This is a circuit specially....
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You wire in some relays and run it in parallel with your key ignition. The wiring schematic is as follows: So do I connect one wire from the 87 terminal (orange) to the red wire, then the blue wire from the next relay to the black wire and so forth I....
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Motor starters generally fall into two categories: full-voltage or reduced-voltage. The choice of which type of starter to use depends on various factors, such as current-carrying capacity of plant wiring, ability of plant power supplies to absorb power....
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This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV, stereo or other line level device. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low....
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Although this design is reproduced directly from the manufacturer s datasheets, its use in this application is rather novel. Originally intended for high-....
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Automatic battery charger automatically starts the charging procedure when battery voltage drops below a certain predefined value and stops after the voltage has risen above the maximum allowed value. Setup can`t be easier, just connect two alligator clips....
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A sawtooth wave generator circuit using a 555 IC is given in the article below.Frequency equation is given with the supply voltage Vcc....
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Certain part of this circuit is directly connected to AC mains. Therefore, do not touch whilst in operation. Disclaimer Please take the greatest of care in handling AC mains supply while constructing this project. If you have no knowledge of mains wiring or....
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Originally Posted by Neil Davis It`s not a sim. It`s a real measurement from a circuit that has basically the same topology as the Tripath data sheet. ....
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By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the ""water high"" sensor, whereas the longer is the ""water low"" sensor. When the water level is below....
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Analog to Digital converter modules are used in Micro controller based projects where the analog signals are required to be converted into digital signal for further processing in Micro controller. The integrated chip used for this purpose is 0809 ADC. This....
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This page describes the conversion of a simple, inexpensive green laser pointer into a lab-grade laser. The heart of this DPSS laser is an inexpensive green laser pointer. Such pointers are actually diode-pumped solid-state (DPSS) lasers consisting of a....
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This tour, available in Stainless DIL 8 legs, can measure 4 analog voltage independent between 0 and 5 volts, and send the result of this measure in the form of four characters on a standard asynchronous serial link. Its serial output is directly TTL or CMOS....
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Here is an ultra simple automatic light switch circuit for bedrooms. After construction,connect the input terminals of this circuit in parallel to the inte...
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This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source. Electronics project....
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By adding discrete inductors in series with the device, we can œtune out some of the capacitance, and improve the eye opening. If we add enough inductance to peak the 3rd harmonic of 240 MHz, with the capacitance of the device and any added board....
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The alarm may be used for a variety of applications, such as frost monitor, room temperature monitor, and so on. In the quiescent state, the circuit draws a current of only a few microamperes, so that, in theory at least, a 9 V dry battery (PP3, 6AM6,....
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Do you suspect your broadband speed (DSL) is slower than it should be It could be as simple as incorrect polarity in your phone wall socket. Build this very cheap, very simple device to find out whether you need to change your wiring! It might not seem that....
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The first section of the 555 timer is wires as an astable oscillator with R2 and C1 setting the frequency. The output is available at pin 5. The second section is wired as a phase inverter. That output is available at pin 9. Resistor R3 and R4 keep output....
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All the naturally occurring phenomena like sound, temperature and pressure etc, are analog in nature. Therefore to make an micro-controller read analog signal for analog-to-digital conversion process, through built-in analog-to-digital converter (ADC), it is....
-
Writing MCU assembly code is often a hard and tedious task. You can simplify software development and gain more time to design the electronics hardware if, instead of manual coding, you use TINA`s Flowchart editor and debugger to generate and debug the MCU....
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For Check battery in car, It use IC CA3140 and Transistor, Easy circuit. For electricity pressure of automobile battery is important many factor. If be high....
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Circuit diagram is water activated relay circuit. In this diagram circuit using two transistors connected as a high gain compound pair. 2N2222A transistors T1 and T2 may be a BC108. Current gain will be the product of each transistor beta, which will be a....
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I have put all the components on the PCB, now i dont know anything about relays, so i`m having trouble connecting the power and the load?....
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Power Integrations announced a new reference design (DER-278) based on the company s single-stage LinkSwitch-PH LED-driver IC family. The new design....
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This metal detector using CS209A made by Cherry Semiconductor. The CS209A is a bipolar monolithic integrated circuit for use in metal detection / proximity sensing applications. The CS209A metal detector IC has two on-chip regulators current, the oscillator....
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The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas. This particular design is optimized....
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Circuit of the LED solar lantern lights presented here is built around one 6V/1W Solar Panel (PhotoVoltaic Panel) and a 4V/800mAh Lead-Acid Battery. Here,....
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This view is not far from wrong because the operation of FM detectors is widely regarded as mysterious. The ratio detector to find out how it works, without....
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Here we introduce a kind of 30W micro switch regulated power supply composed of TOP224Y, its circuit is shown in the diagram. Its feature is using TL431 to replace regulation tube VDz2 in the sampling circuit. That is, it can reach the technical target of....
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The ARMSTRONG OSCILLATOR is used to produce a sine-wave output of constant amplitude and of fairly constant frequency within the rf range. It is generally used as a local oscillator in receivers, as a source in signal generators, and as a radio-frequency....
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Here`s a clap switch free from false triggering. To turn on/off any appliance, you just have to clap twice. The circuit changes its output state only when you clap twice within the set time period. Here, you`ve to clap within 3 seconds. The clap sound sensed....
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The schematic shown below is a circuit of light activated LED using SCR. SCR (Silicon Controlled Rectifiers) or thyristor are physically looks like transistors but their internal circuit and working procedure is totally different as compare to the....
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A very simple to build smoke detector circuit has been discussed here through a schematic diagram, which can be easily built and installed over an area for the necessary detection purposes. The circuit incorporates the versatile FIGARO TGS 813 gas sensor as....
-
4013 dual D-type flip-flop is a monolithic complementary MOS (CMOS) integrated circuit constructed with N- and P- channel enhacement mode transistors. Each....
-
The SA1691 is a monolithic integrated circuit designed for Radio cassette tape recorders, Clock Radios and Headphone Radios This IC include all function from Antenna to Audio power Amplifier of AM/FM Radio By Silan ..
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This circuit is intended for alerting purposes after a certain time is elapsed. It is suitable for table games requiring a fixed time to answer a question, or to move a piece etc. In this view it`s a modern substitute for the old sandglass. Useful also for....
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Using this circuit will give Good Charging results to a Gell Cell or SLA type Batterys as used in my Metal Detector project. And it can be modified to accomidate higher current batterys. It is Probably quite Suitable for up to a 10 A/H Rating ..
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This is a clean preamp that I designed to use with my bass, a power amp, and a cab at a rehearsal space. (Rehearsal space being a fancy name for the singers basement. ) I am very proud of this preamp since, unlike the mu-preamp, I designed it from the ground....
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For this amplifier circuit using three voltage plus, min, and the ground. with a maximum voltage approximately 55Volt DC. And amplifier circuit can use some ic ie IC STK 030, 058, 075, 077, 078, 080, 082, 083, 084, 086. From all the ic I mentioned all of....
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This is extremely simple to build PIC Temperature meter that allows to measure temperature in two different locations at the same time. Never before such a useful and powerful circuit could be built with so little components and yet provide endless....
-
A robot named "Wet Dream" was constructed whose purpose was to roam around, avoid collisions, locate people, and squirt people with an onboard motorized water gun. The robot was built to maneuver in an unstructured environment and be able to react....
-
QST`s most recent development ”the Tri-tet oscillator ”has made the single-tube crystal transmitter a really practical affair at last. Practical because it is now possible to work equally well in two ”and, in a pinch, in three ”amateur bands with a single....
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This circuit shows about TLV3702 Laser Pointer Sensor Circuit Diagram . Features: such as starting a robot, perfectly functional for controlling a ....
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You ll find that this is a very easy project to build. It will transmit good quality sound in the FM band ( 88 108 mhz ). One inportant item is that the....
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This circuit has proven useful when interfacing my computer to home made robotics. It is easy to build and use and it can control two DC motors of any current or voltage rating, depending on the rating of the relays. The circuit also provides two shaft....
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Each line key has three positions. Centralised it connects the line circuit to line to await a call. Downwards (KK) it operates a K relay which switches the line through to the common equipment. Upwards (KL) the line is connected to the line tester. The....
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Hi! I have a 4x10"" Ashdown ABM bass cab driven by a Hughes&Kettner bass top. I just had the idea of modifying the bass top to act as a....
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Here`s a signal injector for those of us like me who don`t have a bench full of nice test equipment. It can be used for tracing audio circuits for troubleshooting, or for working on audio circuits that require some kind of signal for testing. The injector is....
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To extend the measurement range of an available ADC(analog to digital conveter) we can use this autoranging. If it implemented on multiplexed input, this....
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By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the "water high" sensor, whereas the longer is the "water low" sensor. When the water level is below....
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Get my head around the headlight wiring in my car, and I`m curious what purpose the two diodes in this diagram serve. Hoping one of the clever people on here can explain it for me: Wow - thanks for editing my post and the very quick replies. Fantastic. I....
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Colpitts 1MHz To 20 MHz Crystal Oscillator Circuit This is a simple Colpitts crystal oscillator for 1 to 20 MHz, PARTS....
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This circuit is for a simple LED `bar graph` voltmeter. Each op-amp of the 339 quad operational amplifier is used as a comparator for comparing the input voltage Vin against a corresponding voltage level that`s a fixed proportion of the power supply (9V in....
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Drive a latching relay that needs about 70-90mA if the raspberry pi can only deliver about 40mA. I need to find a relay that can handle home appliances but can be controlled by the raspberry pi...
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Here is a remote operated spy robot circuit which can be controlled by using a wireless remote controller. It can capture audio and video information`s from the surroundings and can be sent to a remote station through RF signals. The maximum range is 125....
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This remotely controlled watering system is both inexpensive and easy to expand. It is designed to operate in conjunction with a conventional watering tim....
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Here a simple circuit diagram of duophone that allows you to access two telephone line through a single telephone set. The conversation through each line will entirely private when the conference switch in the dual phone is off. So this duophone circuit has....
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This project was developed as an inexpensive way to drive small dc brushed motors as positioning servos for use on a desktop sized CNC machine. The board is interfaced to the PC through 2 pins of a parallel port. The drive signal on these pins is known as....
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I hook up a tesla pancake coil in series with my bifilar wound coil to generate the resonance and the sharp gradient discharge that creates a vacuum flux. I run the CFL on about. 07amps @12. 42volt + 0. 8694 watts! Around the bifilar pancake coil, I have....
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FM Wireless Microphone Schematic. In some applications, the use of the microphone cable is sometimes very difficultly. So use a cordless microphone is needed. Microphone as it is often referred to as wireless microphones (cordless microphone). Here I share....
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This article by Arthur C. Miller was issued on page 88 to 90 in the book "Radio For The Millions" (prepared in 1945 by Popular Science Monthly staff, but first published in "Popular Scienece Monthly" April 1940). Fans who would like to install a radio on....
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The current testbed deployment provides some degree of device heterogeneity by integrating two different type of IoT experimentation nodes. The deployment is mainly based on a largely utilized TelosB experimentation platform (170 nodes) and to a smaller....
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When you need to test an audio circuit with broadband noise, this circuit works great. It uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly. Audio noise generator drives earphones or small speaker - This....
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Here is a project of a simple automatic night lamp circuit or dark activated 230V lamp circuit, which will automatically activate an AC lamp / bulb when sun set or if the circuit will receive no light. The circuit is very easy to build using no more than....
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How would you like free boost driver designs?! Though I can`t control anyone`s actions, I would appreciate it if anyone wishing to sell this circuit....
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This product is amazing. My computer was having issues with the registry. After installing, scanning, and fixing the errors my computer now runs like it is brand new. I would recommend this to others...
The heart of the switch controller is an Arduino Nano micro-controller - this is going to be the interface between the dashboard switches, wireless steering wheel buttons and the car`s lighting, indicators, windscreen wipers and DigiDash2 GPS stopwatch. This....
Build a logic level shifter (that`s what it`s called) with a few discrete components (transistors and resistors) or you can go for a one-component solution, i. e. an IC. Most ICs won`t accept input voltages as low as 1. 4 V, but I found Fairchild`s FXLP34....
This LM12 audio amplifier circuit will provide a high output power on a 8 ohms or 4 ohms load impedance. The maximum output power delivered by this LM12 audio amplifier is around 60 watts on a 4 ohms load and 100 watts on a 4 ohms load on each channel. A....
The circuit takes Vin, passes it through a SMPS with two MOSFETS (driven by the ir2104 that dies) and into Bat+. The LM321 is just a latch that allow the MCU to control and read the ir2104). The connector in the left comes from the MCU, the right one holds....
This is a design circuit for temperature to digital converter circuit that is based control by LM35 IC. This LM35 is precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperatu ....
This small circuit is ideal for checking the basic operation of an infrared remote control unit. The circuit is based on the brilliantly simple idea of connecting a piezo buzzer directly to an IR receiver IC. This method is almost as simple as connecting a....
Chevy S-10 Blazer Ignition Control (IC) Circuit Wiring Diagram...
The A/D converter employs dual-slope integrator providing 10Hz sampling rate, while Digital output sent to MCU will be multiplexing four bit BCD started from MSD, LSD and NSD respectively...
Small digital design using a Xilinx picoblaze softcore processor, and I`m finding that producing schematics of acceptable quality to be frustrating and time consuming. I`ve attempted to shoehorn previously drawn schematics (From LTSpice, or Eagle) into....
Its basic function is frequency and cycle of the measuring signal, the application of the frequency counter is in a very large range, it is not merely applied to general simple instrument measurement, and apply to other fields such as teaching, scientific....
A number of ham radio operators have made their start on the 10 GHz amateur band using commercial-surplus microwave transceivers made by M/A-Com. These units were originally built in white-painted metal enclosures and are known as "White Boxes" They can be....
Renewable Energy Discussion on various alternative energy, renewable energy, & free energy technologies. Also any discussion about the environment, global warming, and other related topics are welcome here. I will just mention a few things in here which....
The heart of this diy metal detector circuit is the CS209A IC. The metal detector is built with one 100µH coil that has 40 mm in diameter and is made....
Making your own universal remote control systems today is very easy. Such procure the relevant chips, assemble them and here goes, your hi-tech remote control device is working for you. Here we explain a couple remote control chips especially designed for....
This application notes describes how the MAX4929E takes care of switching all low frequency signals (LoF) needed for a 2:1 HDMI/DVI switch while adding high level ESD protection to all outside lines, and how MAX4929E mates with an EDID EPROM, accepting 5V....
The following circuit shows about 1.5 V Lead-Acid Battery Charger Circuit Diagram. Features: comparator s output controls the voltage regulator, ....
The triac should flip on and the light and it should be at nearly 100% brighness. However, this is not what`s happening. Itstead, the light doesn`t turn on at all. Can anyone explain why this might be If I change the gate to be always triggered (i. e. always....
We expect oscillation at the resonant frequency at which the positive feedback is at 0 degrees (in phase) with the input. For oscillation to occur, the gain has to be at least 1 at that frequency. Kaz Oct 30 `12 at 20:39 I still think the 10u cap has wrong....
The photoflash circuit is showed as above. The seagulls SD - 150 type studio flash combines formative light and photography intense light source also accompanied by advanced synchronous remote control device of inside light modulation, which makes many....
To convert a standard LCD interface parallel to serial interface model, use a microcontroller or a dedicated circuit such as the MIC 702 Mictronics you can download the complete data sheet and French by clicking this link. This is a circuit specially....
You wire in some relays and run it in parallel with your key ignition. The wiring schematic is as follows: So do I connect one wire from the 87 terminal (orange) to the red wire, then the blue wire from the next relay to the black wire and so forth I....
Motor starters generally fall into two categories: full-voltage or reduced-voltage. The choice of which type of starter to use depends on various factors, such as current-carrying capacity of plant wiring, ability of plant power supplies to absorb power....
This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV, stereo or other line level device. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low....
Although this design is reproduced directly from the manufacturer s datasheets, its use in this application is rather novel. Originally intended for high-....
Automatic battery charger automatically starts the charging procedure when battery voltage drops below a certain predefined value and stops after the voltage has risen above the maximum allowed value. Setup can`t be easier, just connect two alligator clips....
A sawtooth wave generator circuit using a 555 IC is given in the article below.Frequency equation is given with the supply voltage Vcc....
Certain part of this circuit is directly connected to AC mains. Therefore, do not touch whilst in operation. Disclaimer Please take the greatest of care in handling AC mains supply while constructing this project. If you have no knowledge of mains wiring or....
Originally Posted by Neil Davis It`s not a sim. It`s a real measurement from a circuit that has basically the same topology as the Tripath data sheet. ....
By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the ""water high"" sensor, whereas the longer is the ""water low"" sensor. When the water level is below....
Analog to Digital converter modules are used in Micro controller based projects where the analog signals are required to be converted into digital signal for further processing in Micro controller. The integrated chip used for this purpose is 0809 ADC. This....
This page describes the conversion of a simple, inexpensive green laser pointer into a lab-grade laser. The heart of this DPSS laser is an inexpensive green laser pointer. Such pointers are actually diode-pumped solid-state (DPSS) lasers consisting of a....
This tour, available in Stainless DIL 8 legs, can measure 4 analog voltage independent between 0 and 5 volts, and send the result of this measure in the form of four characters on a standard asynchronous serial link. Its serial output is directly TTL or CMOS....
Here is an ultra simple automatic light switch circuit for bedrooms. After construction,connect the input terminals of this circuit in parallel to the inte...
This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source. Electronics project....
By adding discrete inductors in series with the device, we can œtune out some of the capacitance, and improve the eye opening. If we add enough inductance to peak the 3rd harmonic of 240 MHz, with the capacitance of the device and any added board....
The alarm may be used for a variety of applications, such as frost monitor, room temperature monitor, and so on. In the quiescent state, the circuit draws a current of only a few microamperes, so that, in theory at least, a 9 V dry battery (PP3, 6AM6,....
Do you suspect your broadband speed (DSL) is slower than it should be It could be as simple as incorrect polarity in your phone wall socket. Build this very cheap, very simple device to find out whether you need to change your wiring! It might not seem that....
The first section of the 555 timer is wires as an astable oscillator with R2 and C1 setting the frequency. The output is available at pin 5. The second section is wired as a phase inverter. That output is available at pin 9. Resistor R3 and R4 keep output....
All the naturally occurring phenomena like sound, temperature and pressure etc, are analog in nature. Therefore to make an micro-controller read analog signal for analog-to-digital conversion process, through built-in analog-to-digital converter (ADC), it is....
Writing MCU assembly code is often a hard and tedious task. You can simplify software development and gain more time to design the electronics hardware if, instead of manual coding, you use TINA`s Flowchart editor and debugger to generate and debug the MCU....
For Check battery in car, It use IC CA3140 and Transistor, Easy circuit. For electricity pressure of automobile battery is important many factor. If be high....
Circuit diagram is water activated relay circuit. In this diagram circuit using two transistors connected as a high gain compound pair. 2N2222A transistors T1 and T2 may be a BC108. Current gain will be the product of each transistor beta, which will be a....
I have put all the components on the PCB, now i dont know anything about relays, so i`m having trouble connecting the power and the load?....
Power Integrations announced a new reference design (DER-278) based on the company s single-stage LinkSwitch-PH LED-driver IC family. The new design....
This metal detector using CS209A made by Cherry Semiconductor. The CS209A is a bipolar monolithic integrated circuit for use in metal detection / proximity sensing applications. The CS209A metal detector IC has two on-chip regulators current, the oscillator....
The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas. This particular design is optimized....
Circuit of the LED solar lantern lights presented here is built around one 6V/1W Solar Panel (PhotoVoltaic Panel) and a 4V/800mAh Lead-Acid Battery. Here,....
This view is not far from wrong because the operation of FM detectors is widely regarded as mysterious. The ratio detector to find out how it works, without....
Here we introduce a kind of 30W micro switch regulated power supply composed of TOP224Y, its circuit is shown in the diagram. Its feature is using TL431 to replace regulation tube VDz2 in the sampling circuit. That is, it can reach the technical target of....
The ARMSTRONG OSCILLATOR is used to produce a sine-wave output of constant amplitude and of fairly constant frequency within the rf range. It is generally used as a local oscillator in receivers, as a source in signal generators, and as a radio-frequency....
Here`s a clap switch free from false triggering. To turn on/off any appliance, you just have to clap twice. The circuit changes its output state only when you clap twice within the set time period. Here, you`ve to clap within 3 seconds. The clap sound sensed....
The schematic shown below is a circuit of light activated LED using SCR. SCR (Silicon Controlled Rectifiers) or thyristor are physically looks like transistors but their internal circuit and working procedure is totally different as compare to the....
A very simple to build smoke detector circuit has been discussed here through a schematic diagram, which can be easily built and installed over an area for the necessary detection purposes. The circuit incorporates the versatile FIGARO TGS 813 gas sensor as....
4013 dual D-type flip-flop is a monolithic complementary MOS (CMOS) integrated circuit constructed with N- and P- channel enhacement mode transistors. Each....
The SA1691 is a monolithic integrated circuit designed for Radio cassette tape recorders, Clock Radios and Headphone Radios This IC include all function from Antenna to Audio power Amplifier of AM/FM Radio By Silan ..
This circuit is intended for alerting purposes after a certain time is elapsed. It is suitable for table games requiring a fixed time to answer a question, or to move a piece etc. In this view it`s a modern substitute for the old sandglass. Useful also for....
Using this circuit will give Good Charging results to a Gell Cell or SLA type Batterys as used in my Metal Detector project. And it can be modified to accomidate higher current batterys. It is Probably quite Suitable for up to a 10 A/H Rating ..
This is a clean preamp that I designed to use with my bass, a power amp, and a cab at a rehearsal space. (Rehearsal space being a fancy name for the singers basement. ) I am very proud of this preamp since, unlike the mu-preamp, I designed it from the ground....
For this amplifier circuit using three voltage plus, min, and the ground. with a maximum voltage approximately 55Volt DC. And amplifier circuit can use some ic ie IC STK 030, 058, 075, 077, 078, 080, 082, 083, 084, 086. From all the ic I mentioned all of....
This is extremely simple to build PIC Temperature meter that allows to measure temperature in two different locations at the same time. Never before such a useful and powerful circuit could be built with so little components and yet provide endless....
A robot named "Wet Dream" was constructed whose purpose was to roam around, avoid collisions, locate people, and squirt people with an onboard motorized water gun. The robot was built to maneuver in an unstructured environment and be able to react....
QST`s most recent development ”the Tri-tet oscillator ”has made the single-tube crystal transmitter a really practical affair at last. Practical because it is now possible to work equally well in two ”and, in a pinch, in three ”amateur bands with a single....
This circuit shows about TLV3702 Laser Pointer Sensor Circuit Diagram . Features: such as starting a robot, perfectly functional for controlling a ....
You ll find that this is a very easy project to build. It will transmit good quality sound in the FM band ( 88 108 mhz ). One inportant item is that the....
This circuit has proven useful when interfacing my computer to home made robotics. It is easy to build and use and it can control two DC motors of any current or voltage rating, depending on the rating of the relays. The circuit also provides two shaft....
Each line key has three positions. Centralised it connects the line circuit to line to await a call. Downwards (KK) it operates a K relay which switches the line through to the common equipment. Upwards (KL) the line is connected to the line tester. The....
Hi! I have a 4x10"" Ashdown ABM bass cab driven by a Hughes&Kettner bass top. I just had the idea of modifying the bass top to act as a....
Here`s a signal injector for those of us like me who don`t have a bench full of nice test equipment. It can be used for tracing audio circuits for troubleshooting, or for working on audio circuits that require some kind of signal for testing. The injector is....
To extend the measurement range of an available ADC(analog to digital conveter) we can use this autoranging. If it implemented on multiplexed input, this....
By means of a Relay, employed to drive a water pump, this circuit provides automatic level control of a water reservoir or well. The shorter steel rod is the "water high" sensor, whereas the longer is the "water low" sensor. When the water level is below....
Get my head around the headlight wiring in my car, and I`m curious what purpose the two diodes in this diagram serve. Hoping one of the clever people on here can explain it for me: Wow - thanks for editing my post and the very quick replies. Fantastic. I....
Colpitts 1MHz To 20 MHz Crystal Oscillator Circuit This is a simple Colpitts crystal oscillator for 1 to 20 MHz, PARTS....
This circuit is for a simple LED `bar graph` voltmeter. Each op-amp of the 339 quad operational amplifier is used as a comparator for comparing the input voltage Vin against a corresponding voltage level that`s a fixed proportion of the power supply (9V in....
Drive a latching relay that needs about 70-90mA if the raspberry pi can only deliver about 40mA. I need to find a relay that can handle home appliances but can be controlled by the raspberry pi...
Here is a remote operated spy robot circuit which can be controlled by using a wireless remote controller. It can capture audio and video information`s from the surroundings and can be sent to a remote station through RF signals. The maximum range is 125....
This remotely controlled watering system is both inexpensive and easy to expand. It is designed to operate in conjunction with a conventional watering tim....
Here a simple circuit diagram of duophone that allows you to access two telephone line through a single telephone set. The conversation through each line will entirely private when the conference switch in the dual phone is off. So this duophone circuit has....
This project was developed as an inexpensive way to drive small dc brushed motors as positioning servos for use on a desktop sized CNC machine. The board is interfaced to the PC through 2 pins of a parallel port. The drive signal on these pins is known as....
I hook up a tesla pancake coil in series with my bifilar wound coil to generate the resonance and the sharp gradient discharge that creates a vacuum flux. I run the CFL on about. 07amps @12. 42volt + 0. 8694 watts! Around the bifilar pancake coil, I have....
FM Wireless Microphone Schematic. In some applications, the use of the microphone cable is sometimes very difficultly. So use a cordless microphone is needed. Microphone as it is often referred to as wireless microphones (cordless microphone). Here I share....
This article by Arthur C. Miller was issued on page 88 to 90 in the book "Radio For The Millions" (prepared in 1945 by Popular Science Monthly staff, but first published in "Popular Scienece Monthly" April 1940). Fans who would like to install a radio on....
The current testbed deployment provides some degree of device heterogeneity by integrating two different type of IoT experimentation nodes. The deployment is mainly based on a largely utilized TelosB experimentation platform (170 nodes) and to a smaller....
When you need to test an audio circuit with broadband noise, this circuit works great. It uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly. Audio noise generator drives earphones or small speaker - This....
Here is a project of a simple automatic night lamp circuit or dark activated 230V lamp circuit, which will automatically activate an AC lamp / bulb when sun set or if the circuit will receive no light. The circuit is very easy to build using no more than....
How would you like free boost driver designs?! Though I can`t control anyone`s actions, I would appreciate it if anyone wishing to sell this circuit....
This product is amazing. My computer was having issues with the registry. After installing, scanning, and fixing the errors my computer now runs like it is brand new. I would recommend this to others...
