New Circuits Page 102
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This is the tuned radio frequency receiver for shortwave (25 meter band, 11. 7. 12. 1 MHz). It was created as experimental design for further experiments with the autodyne synchronous receiver (see Polyakov V. T. Autodyne synchronous regenerative receiver. -....
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Using the LTM8008 Module SEPIC converter with six post regulators can be designed a very simple compact power supply electronic project, that has six outputs that can provide different output current for some of outputs. The SEPIC controller`s fixed....
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The security of many electrical devices depends today on the availability of an earthed mains outlet. We should remember that these are connected to the frame or to the metal housing of the equipment and so it routes to the protective earth (PE) connections.....
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The circuit given here can be used to control the brightness of low power incandescent lamps. The circuit is based on IC NE555 which is wired as an astable multivibrator with variable duty cycle. The output of IC is connected to the base of transistor Q1.....
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This circuit consists of two identical intercom units. Each unit contains a power supply, microphone preamplifier, audio amplifier and a Push To Talk (PTT) relay circuit. Only 2 wires are required to connect the units together. Due to the low output....
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In this intercom schematic, the 8 ohm speakers is used as microphone and listening speaker. The 10K potentiometer controls volume and the total gain can be....
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Remove the 6 mm screw holding on the lower rear fairing cover. This is the black plastic piece the spark plug protectors are attached to. Do not remove the lower rear fairing covers, only the machine screw. Fabricate "L" brackets from the mending plates to....
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-
The test beeper generates a sinusoidal signal with a frequency of 1, 000 Hz, a common test frequency for audio amplifiers. It consists of a classical Wien-Bridge oscillator (also known as a Wien-Robinson oscillator). The network that determines the frequency....
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MOC3020M Integrated Circuit. I would love a LED to tell me when each cap is charged but I have no idea how to do that or where to put in the circuit, I have a bucket load of 5v LEDs so making use of some would be great. I have Circuit maker but dont have a....
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With a matching antenna, the FM transmitter circuit shown here can transmit signals up to a range of 2 kilo meters. The transistor Q1 and Q2 forms a classic high sensitive preamplifier stage. The audio signal to be transmitted is coupled to the base of Q1....
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Digital counters have several applications in electronics circuits. Counters in digital electronics are used at different situations. Here we are going to deliver the idea of aRing counter circuit, which is a register counter. Working animation and circuit....
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Electronic switch ES1 connects the frequency determining capacitor to the input of clock oscillator N1. The logic level that exists at the Dm terminal of IC; is shifted towards output Q at a speed that is defined by P1, which enables defining fixing times....
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How to change the brightness of aLED Whether led lights are dimmable Is it possible to adjust the brightness of LEDs LED is basically a diode, when the forward voltage exceeds 0. 7 volt, it starts to glow, and if the forward voltage is less than 0. 7 volt,....
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-
This electronic game pits a human player against the ˜machine. The opponents use a common ˜game token and take turns moving along a path by one, two or three steps, and the winner is the first one to reach the goal exactly. Incredibly enough, this simple....
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The following circuit shows about TDA1524 IC Stereo Preamplifier Circuit Diagram. Features: used for controlling the (volume, balance, bass and ....
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-
How a cutt of a fader is differnet form a transform What does skratch tricks have to do with the fader function The cut on a fader is completely different from a transform. It isn`t an instant on/off but a sloped cut in perhaps anywhere from a few hundred....
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General use camera backlighting base band circuit : the circuit of table of contents, Calyso, iota, matrix, keypad key, memory, IC image, Lcd connector, Lcd backlight driver, Locatest point, hole, Speaker4, camera connector, motor, Midi / MP3 ICS, charging....
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Frequency Meter Circuit of Service Include all the standard frequency bands amateur hf and vhf and uhf And displayed on the LCD screen This is to e...
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WITH its deep, mellow notes, the electric organ is fast gaining the musical limelight. As a rule, these instruments are large and costly. Yet, for the price of a new hat, you can build a duplicate of a small organ that was featured in a recent coast-to-coast....
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I bought a SF-AW210 405nm diode and was running it off my LM317 power supply. I have been running my harvested DVD 16x burner laser diode in this....
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AT89C2051 Digital Visitor Counter. The microcontroller do the above job it receives the signals from the sensors....
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A 100 Watt inverter circuit using minimum number of components. I think it is quite difficult to make a decent one like this with further less components. Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and four 2N3055....
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The emergency driver unit consists of a battery charger and electronic circuitry in one compact case. The batteries. Emergency lighting battery protection from over current and heat. Liquid. Crystal Display. (LCD) screen protection from short circuit and....
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This page describes my modifications to the RIG RX-2 receiver which enable it to be controlled remotely from a computer, using an RS-232 serial interface. The modifications are in two parts: some simple additional hardware, and a new firmware program for the....
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In practical cases a series resistance has always to be inserted, having it the double purpose of limiting the current at pin 7 and to smooth down the stand-by ON/OFF ..
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A harp without strings i. e. IR sensor-receiver pairs function as strings in our device. The device senses when a string is being plucked (causes blockage of IR). Correspondingly, the particular sound is produced by Direct Digital Synthesis. We used 6 TSOP....
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The CA3189 IC integrates a symmetrical limiter, a phase demodulator, an audio amplifier, and a logarithmic detector-amplifier. The logarithmic detector-amplifier is the most interesting part of the IC for the above featured circuit. It can be used to enhance....
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This began as a simple project to build a cheap phono stage for a very old turntable with a cheap cartridge out of parts on hand. However, it turned into a pretty good project that definitely outclasses the rest of my analog setup. Oh well, at least it was....
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There are several applications in which a buttonless keyboard might be useful. In exteriors, they can capitalize on the fact that without buttons the keyboard can be fully closed and therefore it is weather resistant. Moreover, they seem to be easily made in....
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d 101-2 depend on the TV to supply a wide bandwidth video signal. Most black-and-white TVs from 1954 on contain narrowband IF strips or low-pass filters. A wide passband is a disadvantage, because it picks up the chroma signal. In a black-and-white TV, the....
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To avoid distortion of the image, when receiving data through the UART, for VGA, it is recommended to make the data exchange with the terminal in approximately 300-600 us after a signal of vertical synchronization (VSYNC)...
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The all-analog circuit presented controls the rateat which a miniature turbojet engine can be throttled. Increasing or decreasing the throttle too quickly on a miniature turbojet engine, or any jet engine, can lead to quick failure in flight, causing....
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To apperceive whether it is freezing you alone charge to admeasurement the temperature. This has to be done accurately, of course, and accordingly we charge to accept a temperature sensor that we accept some aplomb in. The best has afresh been fabricated for....
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Applying the filtered and rectified AC input to a high-input-voltage linear regulator is the simplest way to produce low current level from an AC source....
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These are my plans for an EMP Generator. It uses flash circuits from disposable cameras to power the coil. I plan to make an instructable of it soon....
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Circuit detail is shown in figure 3. The main elements of the system are a speech amplifier, the audio phase shift network with balanced driver circuit (N1A, N2A), two balanced modulator stages (N1B & N2B), an RF carrier phase shift circuit (N3) and an....
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I am not an engineer, just an experimenter and hacker and prototyper etc, so, thanks to people who know a lot more than I do, I learned that this is not safe to use NOTE: This can only be used to dim a unit that runs off of a transformer-based power supply,....
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A classic circuit of regulation of tone of three way, with which we can regulate low, mid and high frequencies, of acoustic signal. The boost/cut can be regulated in the range of ± 18 dB/oct. In the circuit the supply is ± 15V, but can be also supplied with....
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This project has been developed together with some other OMs (in particular Marco IW1DGG) in our local radio club. When we started looking at a simple transmitter providing sufficient power to exice the local ATV repeater we did not find anything simple to....
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This electronic infrared adapter serial transceiver circuit is based on a TFDS4500 IC and can be used to transmit data from portable devices to a PC using IR and serial port. TFD4500 infrared adapter it`s a low power infrared transceiver modules for serial....
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Open Loop Speed Control of a DC Motor via 8255 Digital I/O Controller chip using TCP/IP Server-Client Application Programmed in Visual Basic. The 8bit DAC0832 chip is used as the Digital to Analog Converter. In this project open loop control of a DC motor....
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Simple modifications I`ve done on these rigs, to overcome some common shortcomings. Not all kits need these mods, but many do. Some overcomeminor inconveniences, and some potentially serious problems. If you have built one of these kits before, and....
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If you ground the blue wire at the headlamp switch and the lights come on the switch is bad. I know you have already checked continuity of the switch though. If I recall the relay has 2 small terminals and 2 larger ones. The one smaller one should that has....
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The following page outlines detail information and schematic of the 1985 Pontiac Fiero Wiring Diagram and Electrical System. The electrical system consists of:..
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A band-pass filter is a circuit which is designed to pass signals only in a certain band of frequencies while attenuating all signals outside this band. The parameters of importance in a bandpass filter are the high and low cut-off frequencies (fH and fl),....
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Many of you will have an old mobile phone gathering dust. The circuit shown in this article gives the old mobile a new lease of life, enabling it to switch an electrical appliance on and off in or around the home. The circuit will even talk to you on in....
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Stepper motor control circuit Stepper motor control circuit diagram using TLE5206 for remote control car....
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DTMF dual tone multifrequency The signal is a commonly used signalling in the telephone network, no matter on home telephones, cellular telephones or SPC exchanges, adopt DTMF signal transmission receiving numbers more. DTMF technology can also be used for....
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This Module employs an unusual topology, still maintaining the basic op-amp circuitry of the Main Module with a few changes in resistor values. A special feature of this circuit is the use of six ways switches instead of the more common potentiometers: in....
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Transformerless Power Supply Circuit Diagram. Selection of the Dropping capacitor and the circuit design requires some technical knowledge and practical experience to get the desired voltage and current ..
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Circuit This circuit diagram of UPS is designed to use with a cordless telephones that cannot be operated during power failure. Since the ups is only meant for telephone, it`s output power is limiter to 1. 5W. This ups circuit is economical and can be....
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A circuit diagram and sample code is provided to read and write to 74LC16B memory from a PICAXE microcontroller....
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Here is an energy saving solar inverter battery charger. It harvests solar energy to replenish 12 volt inverter battery. It has auto cut off facility to st....
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The Schematic above shows a 10A power suplly with a 5V output and with power 50W. It is a flyback converter operating in the continuous mode. The circuit features a primary side and secondary side controller with full protection from fault conditions such as....
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With IC SLB0586A from Siemens you can build a simple touch light dimmer circuit that will allow you to adjust the lamp intensity. Together with a TIC206D...
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Interfacing LCD Display to Avr micro controllers-Atmega8 and Atmega32 with circuit diagram and code/program using embedded C to download....
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As we know that all semiconductors have this bad habit of changing its basic characteristics in response to ambient temperature changes. Especially basic electronic components like transistors and diodes are very much prone to their case temperature....
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While smoke alarms are quite cheap devices, the cost of 9V batteries quickly exceeds their purchase price. Added to that is the irritation of random beeps....
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This is basic of workmaship LM35 temperatur sensor, whish is taken from the LM35 spending and boosted again by the amplifier op-amp. High output if the sensor is received by ic LM35 high temperature. You can use the output as driver relay, fan, or other. And....
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Given favourable radio wave propagation, the shortwave and radio amateur band are chock-a-block with SSB (single-sideband) transmissions, which no matter what language they`re in, will fail to produce intelligible speech on an AM radio. SSB is transmitted....
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Working Principle: As seen in the figure 4-187, the circuit consists of power circuit, pulse oscillator and high voltage generator. The power circuit consists of S,FU,TI,VD1-VD4,C1,C3,IC1,R1 and VL. The pulse oscillator consists of IC1,R2,R3,RP1 and C2. The....
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Let me tell you a tale. 8 months and 18 days ago, on March 25, I was sent an email requesting a commissioned piece of electronic clothing similar to my DJ jacket for a musical performer to wear on stage. I mulled it over for a bit, and came up with the idea....
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Input voltage range of 0-10 V is converted to proportional frequency at output of optoisolator with high linearitv bv RM4151 converter used in combination with RC3403A quad opamp that provides. functions of inverter, integrator, regulator, and LED driver -....
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The circuit uses a Hall-effect sensor, which consists of an IC that resides in a small gap in a flux-collector toroid, to measure dc current from 1 to 40 A. Wrap the current-carrying wire through the toroid; the Hall voltage VH is then linearly proportional....
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This circuit is used to trigger a camera`s electronic shutter circuit when a flash of lightning is present. This circuit would also work for photographing fireworks displays or other events involving flashes of light. In a nutshell, the photo darlington....
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After doing a little research I found out that I can change voltage by either using a voltage regulator chip or resistors. I have a couple different scenarios in which I`ll have to drop the voltage for my motors and I was wondering which method to use for....
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Sid, I put together two working examples, one using a PNP and NPN transistor, and one using two MOSFETs. Both work fine, but as expected the MOSFET circuit consumes much less current (0.1 mA vs. 4.5 mA). Comments, suggestions, and bug reports gratefully....
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Here the 50W inverter circuit build based power MOSFET FQB45N03 and IC TL494. This inverter will convert 12-14V DC input from car battery, become 220V AC output with 50Hz sine wave frequency. The main oscillator, a voltage reference and comparator collected....
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This is a 100 watt basic power amp that was designed to be (relatively) easy to build at a reasonable cost. It has better performance (read: musical quality) than the standard STK module amps that are used in practically every mass market stereo receiver....
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The Supertex HV440 is used for implementing a pulse width modulated high voltage ring generator for telecommunication applications. The HV440 CAN operate in both closed-loop or open-loop. A closed-loop design is more complex but provides better load....
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The following document contains information related to Volvo 440 electrical installation schematic diagram. It such the wiring schematic for Volvo 440, 460, and 480 series..
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The heart of this controller is a switch mode voltage converter. L1 converts voltage. Q1 is the switch that control current the goes through L1. The b....
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This instrument measures complex impedance over the 1. 6 - 33 MHz HF spectrum. It also calculates and displays the VSWR of the impedance referenced to 50 ohms. The most common application of the meter is as an antenna analyser. The design was published in....
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The remaining equipment is installed at the train layout`s computer interface. The interface I used here is a Lenz LI100F configured to communicate at 9600bps. Both the LI100F and the XBee Explorer serial are configured as DCE (Data Communications Equipment)....
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Here is a simple circuit of an FM booster that can be used to listen to programmes from distant FM stations clearly. This amplifier will pull in all distant FM stations clearly. The circuit is configured as a common-emitter tuned RF pre-amplifier wired....
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An L7805 provides a 5v rail. The input and output of the reg is bridged by a 470 F and a 10 F capacitor respectively to try and smooth things out a bit. The 5v rail created by the L7805 then powers the MAX232 level shifter and the GPS module itself. Thee....
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The figure shows a basic two-channel op-amp mixer circuit. The gain is equal to R5/R1 or R5/R2 for channel 1 or 2, respectively. Typically R1 and R2 are 2. 2 to 22 k © and R5 is 10 to 100 k ©, and the op amp is any suitable type, such as a 741 or its....
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In case of Japan, the electricity to be using in the home is 50 Hz or 60 Hz. In case of 50 Hz, the 1-cycle sine wave occurs the 50 times for the 1 second. 60 Hz are the 60 times. There is a way of making make the Lissajous as the way of understanding that....
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I`ve tried to make drivers for my H-bridge circuit using complimentary emmiters but the square wave outputs runat a constant 25v instead of +-10v square wave The image is a bit hard to read but it looks like your mosfets` gates and sources are wire together....
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This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker. In the circuit on the left, the speaker is isolated from the oscillator by the NPN medium power transistor which also provides more current than can be obtained....
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This project is related to the other tube amplifier projects I have posted. It has more than a casual similarity to the first Push-Pull EL84 (6BQ5) Oddwatt project from nearly two years ago. Both tube amplifier projects use EL84 / 6BQ5 tubes and the earlier....
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This is simple intercom circuit. Here I have used common Ic LM380. Now the switch is in the talk position for the speaker on the left, And the other persons position is listening position. If other one wants to speak The switch must be change to another....
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Long used to improve efficiency, reduce ripple, and shrink capacitor and inductor size in buck converters, the multiphase approach can provide the same benefits for boost converters....
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This is the tuned radio frequency receiver for shortwave (25 meter band, 11. 7. 12. 1 MHz). It was created as experimental design for further experiments with the autodyne synchronous receiver (see Polyakov V. T. Autodyne synchronous regenerative receiver. -....
Using the LTM8008 Module SEPIC converter with six post regulators can be designed a very simple compact power supply electronic project, that has six outputs that can provide different output current for some of outputs. The SEPIC controller`s fixed....
The security of many electrical devices depends today on the availability of an earthed mains outlet. We should remember that these are connected to the frame or to the metal housing of the equipment and so it routes to the protective earth (PE) connections.....
The circuit given here can be used to control the brightness of low power incandescent lamps. The circuit is based on IC NE555 which is wired as an astable multivibrator with variable duty cycle. The output of IC is connected to the base of transistor Q1.....
This circuit consists of two identical intercom units. Each unit contains a power supply, microphone preamplifier, audio amplifier and a Push To Talk (PTT) relay circuit. Only 2 wires are required to connect the units together. Due to the low output....
In this intercom schematic, the 8 ohm speakers is used as microphone and listening speaker. The 10K potentiometer controls volume and the total gain can be....
Remove the 6 mm screw holding on the lower rear fairing cover. This is the black plastic piece the spark plug protectors are attached to. Do not remove the lower rear fairing covers, only the machine screw. Fabricate "L" brackets from the mending plates to....
The test beeper generates a sinusoidal signal with a frequency of 1, 000 Hz, a common test frequency for audio amplifiers. It consists of a classical Wien-Bridge oscillator (also known as a Wien-Robinson oscillator). The network that determines the frequency....
MOC3020M Integrated Circuit. I would love a LED to tell me when each cap is charged but I have no idea how to do that or where to put in the circuit, I have a bucket load of 5v LEDs so making use of some would be great. I have Circuit maker but dont have a....
With a matching antenna, the FM transmitter circuit shown here can transmit signals up to a range of 2 kilo meters. The transistor Q1 and Q2 forms a classic high sensitive preamplifier stage. The audio signal to be transmitted is coupled to the base of Q1....
Digital counters have several applications in electronics circuits. Counters in digital electronics are used at different situations. Here we are going to deliver the idea of aRing counter circuit, which is a register counter. Working animation and circuit....
Electronic switch ES1 connects the frequency determining capacitor to the input of clock oscillator N1. The logic level that exists at the Dm terminal of IC; is shifted towards output Q at a speed that is defined by P1, which enables defining fixing times....
How to change the brightness of aLED Whether led lights are dimmable Is it possible to adjust the brightness of LEDs LED is basically a diode, when the forward voltage exceeds 0. 7 volt, it starts to glow, and if the forward voltage is less than 0. 7 volt,....
This electronic game pits a human player against the ˜machine. The opponents use a common ˜game token and take turns moving along a path by one, two or three steps, and the winner is the first one to reach the goal exactly. Incredibly enough, this simple....
The following circuit shows about TDA1524 IC Stereo Preamplifier Circuit Diagram. Features: used for controlling the (volume, balance, bass and ....
How a cutt of a fader is differnet form a transform What does skratch tricks have to do with the fader function The cut on a fader is completely different from a transform. It isn`t an instant on/off but a sloped cut in perhaps anywhere from a few hundred....
General use camera backlighting base band circuit : the circuit of table of contents, Calyso, iota, matrix, keypad key, memory, IC image, Lcd connector, Lcd backlight driver, Locatest point, hole, Speaker4, camera connector, motor, Midi / MP3 ICS, charging....
Frequency Meter Circuit of Service Include all the standard frequency bands amateur hf and vhf and uhf And displayed on the LCD screen This is to e...
WITH its deep, mellow notes, the electric organ is fast gaining the musical limelight. As a rule, these instruments are large and costly. Yet, for the price of a new hat, you can build a duplicate of a small organ that was featured in a recent coast-to-coast....
I bought a SF-AW210 405nm diode and was running it off my LM317 power supply. I have been running my harvested DVD 16x burner laser diode in this....
AT89C2051 Digital Visitor Counter. The microcontroller do the above job it receives the signals from the sensors....
A 100 Watt inverter circuit using minimum number of components. I think it is quite difficult to make a decent one like this with further less components. Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and four 2N3055....
The emergency driver unit consists of a battery charger and electronic circuitry in one compact case. The batteries. Emergency lighting battery protection from over current and heat. Liquid. Crystal Display. (LCD) screen protection from short circuit and....
This page describes my modifications to the RIG RX-2 receiver which enable it to be controlled remotely from a computer, using an RS-232 serial interface. The modifications are in two parts: some simple additional hardware, and a new firmware program for the....
In practical cases a series resistance has always to be inserted, having it the double purpose of limiting the current at pin 7 and to smooth down the stand-by ON/OFF ..
A harp without strings i. e. IR sensor-receiver pairs function as strings in our device. The device senses when a string is being plucked (causes blockage of IR). Correspondingly, the particular sound is produced by Direct Digital Synthesis. We used 6 TSOP....
The CA3189 IC integrates a symmetrical limiter, a phase demodulator, an audio amplifier, and a logarithmic detector-amplifier. The logarithmic detector-amplifier is the most interesting part of the IC for the above featured circuit. It can be used to enhance....
This began as a simple project to build a cheap phono stage for a very old turntable with a cheap cartridge out of parts on hand. However, it turned into a pretty good project that definitely outclasses the rest of my analog setup. Oh well, at least it was....
There are several applications in which a buttonless keyboard might be useful. In exteriors, they can capitalize on the fact that without buttons the keyboard can be fully closed and therefore it is weather resistant. Moreover, they seem to be easily made in....
d 101-2 depend on the TV to supply a wide bandwidth video signal. Most black-and-white TVs from 1954 on contain narrowband IF strips or low-pass filters. A wide passband is a disadvantage, because it picks up the chroma signal. In a black-and-white TV, the....
To avoid distortion of the image, when receiving data through the UART, for VGA, it is recommended to make the data exchange with the terminal in approximately 300-600 us after a signal of vertical synchronization (VSYNC)...
The all-analog circuit presented controls the rateat which a miniature turbojet engine can be throttled. Increasing or decreasing the throttle too quickly on a miniature turbojet engine, or any jet engine, can lead to quick failure in flight, causing....
To apperceive whether it is freezing you alone charge to admeasurement the temperature. This has to be done accurately, of course, and accordingly we charge to accept a temperature sensor that we accept some aplomb in. The best has afresh been fabricated for....
Applying the filtered and rectified AC input to a high-input-voltage linear regulator is the simplest way to produce low current level from an AC source....
These are my plans for an EMP Generator. It uses flash circuits from disposable cameras to power the coil. I plan to make an instructable of it soon....
Circuit detail is shown in figure 3. The main elements of the system are a speech amplifier, the audio phase shift network with balanced driver circuit (N1A, N2A), two balanced modulator stages (N1B & N2B), an RF carrier phase shift circuit (N3) and an....
I am not an engineer, just an experimenter and hacker and prototyper etc, so, thanks to people who know a lot more than I do, I learned that this is not safe to use NOTE: This can only be used to dim a unit that runs off of a transformer-based power supply,....
A classic circuit of regulation of tone of three way, with which we can regulate low, mid and high frequencies, of acoustic signal. The boost/cut can be regulated in the range of ± 18 dB/oct. In the circuit the supply is ± 15V, but can be also supplied with....
This project has been developed together with some other OMs (in particular Marco IW1DGG) in our local radio club. When we started looking at a simple transmitter providing sufficient power to exice the local ATV repeater we did not find anything simple to....
This electronic infrared adapter serial transceiver circuit is based on a TFDS4500 IC and can be used to transmit data from portable devices to a PC using IR and serial port. TFD4500 infrared adapter it`s a low power infrared transceiver modules for serial....
Open Loop Speed Control of a DC Motor via 8255 Digital I/O Controller chip using TCP/IP Server-Client Application Programmed in Visual Basic. The 8bit DAC0832 chip is used as the Digital to Analog Converter. In this project open loop control of a DC motor....
Simple modifications I`ve done on these rigs, to overcome some common shortcomings. Not all kits need these mods, but many do. Some overcomeminor inconveniences, and some potentially serious problems. If you have built one of these kits before, and....
If you ground the blue wire at the headlamp switch and the lights come on the switch is bad. I know you have already checked continuity of the switch though. If I recall the relay has 2 small terminals and 2 larger ones. The one smaller one should that has....
The following page outlines detail information and schematic of the 1985 Pontiac Fiero Wiring Diagram and Electrical System. The electrical system consists of:..
A band-pass filter is a circuit which is designed to pass signals only in a certain band of frequencies while attenuating all signals outside this band. The parameters of importance in a bandpass filter are the high and low cut-off frequencies (fH and fl),....
Many of you will have an old mobile phone gathering dust. The circuit shown in this article gives the old mobile a new lease of life, enabling it to switch an electrical appliance on and off in or around the home. The circuit will even talk to you on in....
Stepper motor control circuit Stepper motor control circuit diagram using TLE5206 for remote control car....
DTMF dual tone multifrequency The signal is a commonly used signalling in the telephone network, no matter on home telephones, cellular telephones or SPC exchanges, adopt DTMF signal transmission receiving numbers more. DTMF technology can also be used for....
This Module employs an unusual topology, still maintaining the basic op-amp circuitry of the Main Module with a few changes in resistor values. A special feature of this circuit is the use of six ways switches instead of the more common potentiometers: in....
Transformerless Power Supply Circuit Diagram. Selection of the Dropping capacitor and the circuit design requires some technical knowledge and practical experience to get the desired voltage and current ..
Circuit This circuit diagram of UPS is designed to use with a cordless telephones that cannot be operated during power failure. Since the ups is only meant for telephone, it`s output power is limiter to 1. 5W. This ups circuit is economical and can be....
A circuit diagram and sample code is provided to read and write to 74LC16B memory from a PICAXE microcontroller....
Here is an energy saving solar inverter battery charger. It harvests solar energy to replenish 12 volt inverter battery. It has auto cut off facility to st....
The Schematic above shows a 10A power suplly with a 5V output and with power 50W. It is a flyback converter operating in the continuous mode. The circuit features a primary side and secondary side controller with full protection from fault conditions such as....
With IC SLB0586A from Siemens you can build a simple touch light dimmer circuit that will allow you to adjust the lamp intensity. Together with a TIC206D...
Interfacing LCD Display to Avr micro controllers-Atmega8 and Atmega32 with circuit diagram and code/program using embedded C to download....
As we know that all semiconductors have this bad habit of changing its basic characteristics in response to ambient temperature changes. Especially basic electronic components like transistors and diodes are very much prone to their case temperature....
While smoke alarms are quite cheap devices, the cost of 9V batteries quickly exceeds their purchase price. Added to that is the irritation of random beeps....
This is basic of workmaship LM35 temperatur sensor, whish is taken from the LM35 spending and boosted again by the amplifier op-amp. High output if the sensor is received by ic LM35 high temperature. You can use the output as driver relay, fan, or other. And....
Given favourable radio wave propagation, the shortwave and radio amateur band are chock-a-block with SSB (single-sideband) transmissions, which no matter what language they`re in, will fail to produce intelligible speech on an AM radio. SSB is transmitted....
Working Principle: As seen in the figure 4-187, the circuit consists of power circuit, pulse oscillator and high voltage generator. The power circuit consists of S,FU,TI,VD1-VD4,C1,C3,IC1,R1 and VL. The pulse oscillator consists of IC1,R2,R3,RP1 and C2. The....
Let me tell you a tale. 8 months and 18 days ago, on March 25, I was sent an email requesting a commissioned piece of electronic clothing similar to my DJ jacket for a musical performer to wear on stage. I mulled it over for a bit, and came up with the idea....
Input voltage range of 0-10 V is converted to proportional frequency at output of optoisolator with high linearitv bv RM4151 converter used in combination with RC3403A quad opamp that provides. functions of inverter, integrator, regulator, and LED driver -....
The circuit uses a Hall-effect sensor, which consists of an IC that resides in a small gap in a flux-collector toroid, to measure dc current from 1 to 40 A. Wrap the current-carrying wire through the toroid; the Hall voltage VH is then linearly proportional....
This circuit is used to trigger a camera`s electronic shutter circuit when a flash of lightning is present. This circuit would also work for photographing fireworks displays or other events involving flashes of light. In a nutshell, the photo darlington....
After doing a little research I found out that I can change voltage by either using a voltage regulator chip or resistors. I have a couple different scenarios in which I`ll have to drop the voltage for my motors and I was wondering which method to use for....
Sid, I put together two working examples, one using a PNP and NPN transistor, and one using two MOSFETs. Both work fine, but as expected the MOSFET circuit consumes much less current (0.1 mA vs. 4.5 mA). Comments, suggestions, and bug reports gratefully....
Here the 50W inverter circuit build based power MOSFET FQB45N03 and IC TL494. This inverter will convert 12-14V DC input from car battery, become 220V AC output with 50Hz sine wave frequency. The main oscillator, a voltage reference and comparator collected....
This is a 100 watt basic power amp that was designed to be (relatively) easy to build at a reasonable cost. It has better performance (read: musical quality) than the standard STK module amps that are used in practically every mass market stereo receiver....
The Supertex HV440 is used for implementing a pulse width modulated high voltage ring generator for telecommunication applications. The HV440 CAN operate in both closed-loop or open-loop. A closed-loop design is more complex but provides better load....
The following document contains information related to Volvo 440 electrical installation schematic diagram. It such the wiring schematic for Volvo 440, 460, and 480 series..
The heart of this controller is a switch mode voltage converter. L1 converts voltage. Q1 is the switch that control current the goes through L1. The b....
This instrument measures complex impedance over the 1. 6 - 33 MHz HF spectrum. It also calculates and displays the VSWR of the impedance referenced to 50 ohms. The most common application of the meter is as an antenna analyser. The design was published in....
The remaining equipment is installed at the train layout`s computer interface. The interface I used here is a Lenz LI100F configured to communicate at 9600bps. Both the LI100F and the XBee Explorer serial are configured as DCE (Data Communications Equipment)....
Here is a simple circuit of an FM booster that can be used to listen to programmes from distant FM stations clearly. This amplifier will pull in all distant FM stations clearly. The circuit is configured as a common-emitter tuned RF pre-amplifier wired....
An L7805 provides a 5v rail. The input and output of the reg is bridged by a 470 F and a 10 F capacitor respectively to try and smooth things out a bit. The 5v rail created by the L7805 then powers the MAX232 level shifter and the GPS module itself. Thee....
The figure shows a basic two-channel op-amp mixer circuit. The gain is equal to R5/R1 or R5/R2 for channel 1 or 2, respectively. Typically R1 and R2 are 2. 2 to 22 k © and R5 is 10 to 100 k ©, and the op amp is any suitable type, such as a 741 or its....
In case of Japan, the electricity to be using in the home is 50 Hz or 60 Hz. In case of 50 Hz, the 1-cycle sine wave occurs the 50 times for the 1 second. 60 Hz are the 60 times. There is a way of making make the Lissajous as the way of understanding that....
I`ve tried to make drivers for my H-bridge circuit using complimentary emmiters but the square wave outputs runat a constant 25v instead of +-10v square wave The image is a bit hard to read but it looks like your mosfets` gates and sources are wire together....
This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker. In the circuit on the left, the speaker is isolated from the oscillator by the NPN medium power transistor which also provides more current than can be obtained....
This project is related to the other tube amplifier projects I have posted. It has more than a casual similarity to the first Push-Pull EL84 (6BQ5) Oddwatt project from nearly two years ago. Both tube amplifier projects use EL84 / 6BQ5 tubes and the earlier....
This is simple intercom circuit. Here I have used common Ic LM380. Now the switch is in the talk position for the speaker on the left, And the other persons position is listening position. If other one wants to speak The switch must be change to another....
Long used to improve efficiency, reduce ripple, and shrink capacitor and inductor size in buck converters, the multiphase approach can provide the same benefits for boost converters....
