New Circuits Page 182
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The lie detector presented here has been designed to detect skin resistance and to give visual indication, verified electronic project...
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Tone control or pre-amplifier is an amplifier circuit supporters. Sometimes some of us do not know where a good amplifier, a raft alone and the results are not much different or even the same. Therefore we must know the character of the advantages and....
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Above is a schematic diagram of a type of audio oscillator known as a twin "T" phase shift oscillator. It gets its name from the phase shift network made up of R3, R4 and C3 plus C1, C2 and R2 which shifts the phase of the signal fed back from the collector....
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This version of the trigger circuit for the stop-motion camera system uses an electret microphone for a sonic input, but the designer can substitute an LED and photodiode pair to create an optical trigger. For a recent home-brew project, I built a....
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This circuit, enclosed in a small plastic box, can be placed into a bag or handbag. A small magnet is placed close to the reed switch and connected to the hand or the clothes of the person carrying the bag by means of a tiny cord. If the bag is snatched....
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The LTC4425 is a constant-current/constant-voltage linear charger designed to charge a 2-cell supercap stack from either a Li-Ion/Polymer battery, a USB port, or a 2. 7V to 5. 5V current-limited supply. The part operates as an ideal diode with an extremely....
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An AD8205 can be used to make a high-side current sense with a low side switch. Besides AD8205, an inductive load (solenoid) and a resistive shunt are added in this circuit. The resistive shunt is placed on high-side and the switch is placed on low-side, so....
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An embedded system which is used for tracking and positioning of any vehicle by using Global Positioning System (GPS) and Global system for mobile communication (GSM). In this project AT89S52 microcontroller is used for interfacing to various hardware....
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There is one switch to reset the board. When reset is held, the board is in bootloader mode waiting for an upload from the development computer for 5 seconds. After 5 seconds, the current program is run. This board can be powered by the USB connector subject....
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1996 Isuzu Rodeo Headlight Wiring Diagram...
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The TDA7381 is a class AB audio power amplifier in Flexiwatt25 package designed for car radio applications. You you can also use this circuit for other purposes. Thanks to the fully complementary PNP/NPN output configuration the TDA7381 allows a rail to rail....
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This circuit was designed as a warning flasher to alert road users to dangerous situations in the dark. Alternatively, it can act as a bicycle light (subject to traffic regulations and legislation). White LEDs only are recommended if the circuit is used as a....
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A photo or slightly activated relay normally open relay in the closed circuit / contact with the light. In this circuit, a photodiode is used to sense light. The photodiode has a high resistance in the absence of light strikes. The photodiode is connected to....
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Anyone who has designed circuits using the 555 timer chip will, at some time have wished that it could be programmed for longer timing periods. Timing periods greater than a few minutes are difficult to achieve because component leakage currents in large....
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This was a small circuit made for driving an Impact counter. The heart being ICL8038. It must have been a Motor driving a Conveyor, the motor has a feedback attachment called Tachogenerator. Only part of the circuit is shown here. See the image of product....
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This dual power supply is based on the L165 power operational amplifier from SGS-Thomson Micro electronics. The IC L165 can easily deliver up to 3. 5A of current (internally limited). The IC is available in Pentawatt package and is very suitable for power....
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A TTL logic probe is an indispensable tool for digital circuit troubleshooting. Various methods can be used to design a logic probe. The most common designs employ opamps, logic (OR, NOT, XOR) gates, and transistors. The circuit presented here uses NAND....
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The A2060H is an H-Bridge extension for the Programmable Logic Head ( A2060 ). With the help of an external power supply to provide the motor current, the A2060H provides variable-speed, bi-directional drive to DC motors. The motors can operate at anywhere....
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Designing the target designator on the basis of MSP430F149 one-chip computer, in order to meet the army field and set up the goal fast while training, and can be according to the needs of different tactics flexible to reveal the goal and bomb some, etc.....
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The LDR is a variable resistor whose resistance decreases with increase in light intensity. When the light falling on an LDR has normal intensity, its Resistance is large enough and the voltage across R is insufficient to trigger the SCR. However, when light....
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In those circuits a set of switches (conforming to code) are pressed one by one within the specified time to open the lock. In some other circuits, custom-built ICs are used and positive and negative logic pulses are keyed in sequence as per the code by two....
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The sunset lamp comes on at full brightness and then slowly fades out over 1.5 hours time and stays off until power is recycled....
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The circuit is intentionally designed using old type transistor, it is to get the harmonic distortion and to avoid the difficulty of finding good components. Amplifier (s) can be easily supplied by plug-in wall transformer 12V. Closing SW1 bass boost is....
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The following circuit shows about Light Barrier Sensor Detector Circuit Diagram. Features: single transistor, The potentiometer is adjusted, 6V ....
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I assume anyone who wants to make this can read the schematics bellow Basic principles:NOTE:Li-Ion batteries shouldn`t be discharged bellow 3V (In....
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This circuit switches a printer s USB connection from a PC to a laptop. What was needed was a method of allowing a laptop to use the printer occasionally....
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This circuit may be used to replace the single current limiting resistor often found in dirt cheap battery chargers. The alternative shown here will eventually pay off because you no longer have to throw away your NiCds after three months or so of....
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Afshin Izadian at Indiana University has invented a new power inverter that employs just a single switching transistor and generates infinite-level voltages....
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This project article was originally written in 2004 when most computers had parallel ports. This is no longer the case, so much of this information is now outdated. The Mini RC Car Project has been one of my favorites to do. If you haven`t checked that....
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Most homes today have at least a few infrared remote controls, whether they be for the television, the video recorder, the stereo, etc. Despite that fact, who among us has not cursed the light that remained lit after we just sat down in a comfortable chair....
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The ADC12038 families are 12-bit plus sign sampling ADC converters with serial I/O. These devices have configurable Analog multiplexers with 2, 4, or 8 input channels. On re- quest, these A/Ds perform a self calibration routine that minimizes linearity,....
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This is a circuit of 6 Zone Alarm with LED Display . This alarm system has 6 independent zones, a 7 segment LED display, 1 timed entry/exit zone ....
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This post provides the LCD interfacing code using PIC16F84A microcontroller. This code is written in C language using MPLAB with HI-TECH C compiler. You ca....
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In these times with viruses and other threats from the Internet it would be nice to have reassurance that the PC cannot be infected. That is why this circuit was designed. It makes it possible to install multiple hard disks inside the case of a PC, which are....
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The TX500 is a simple to build 500mW FM Transmitter. It consists of three blocks; modulator / oscillator, two stage 500mW VHF amplifier and LED based power meter. The TX500 allows to transmit audio signals to FM band at frequencies from 88 MHz to 108 MHz.....
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Touching eight-sound five-flash dynamic toy circuit diagram is shown in the diagram. It consists of HFC3018 module, and it can generate eight kinds ofdifferent voices: like step gunfire, aviation gunfire, game sight, telephone sight, bomb 1, bomb 2 sound,....
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After testing the motors I found current draw as high as 1. 3Amps. So I stuck 2 of the SN754410 H-Bridges on top of each other, and then built a heat sink from an aluminum can. Should be OK for 2Amps or more. The heat sink is just the aluminum can bent into....
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This is a simple circuit of Positive Voltage Doubler. This circuit uses the MAX1044/ICL7660. The schottky diode was chosen to reduces the voltage drop. This....
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The transmitter part of the circuit is build around IC1(NE 555). The IC1 is wired as an astable multi vibrator operating at 40KHz. The output of IC1 is amplifier the complementary pair of transistors ( Q1 & Q2) and transmitted by the ultrasonic transmitter....
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This diagram is certainly the 6 transistor Tilden H-bridge circuit; while not as old as the original basic H-bridge, this goes way back, and will be the basis for a lot of BEAM driver circuits. Bruce Robinson explaination about this circuit....
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Dear geekslutz, I have been sort of mucking about modifying my cheap mxl v67s to have a good enough condenser to tide me over until I can afford to....
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To increase one`s chances of seeing the northern lights, the uncertainties of existing aurora prediction methods can be bypassed by sensing the light from the aurora directly. The Aurora Alarm is a device which accomplishes this objective through the use of....
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The circuit monitors PC keyboard activity through five-pin DIN connector J1. When the user presses a key, the keyboard sends a series of negative-going pulses on pin 2. In conjunction with Q1 and C3, the op amp essentially functions as an integrator, which....
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Using the LM2876 audio power amplifier circuit can be designed a very simple high efficiency power audio amplifier capable of delivering 40W of continuous average power to an 8 © load with 0. 1% THD+N from 20Hz 20kHz. The LM2876 audio power amplifier circuit....
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A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist`s workbench. This circuit is not an absolute novelty, but it`s simple, reliable, ""rugged"" and short-proof, featuring variable voltage up to 24V and variable current....
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Here is the circuit diagram of a simple two transistor alarm circuit that can be operated from a 9V PP3 battery. Here the two transistors are wired to form an oscillator whose frequency increases when switch S2 is pressed and decreases when S2 is released.....
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Hello, I assembled a circuit on a breadboard which is separated in 2 parts: the right part is for generating an alarm which wails. the left part is....
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The LA2010 is an IC for detecting interprogram spaces to pick out the starting point of a program immediately preceding or following a musical program recorded on tape. By Sanyo Semiconductor Corporation ..
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This invention is a back EMF permanent electromagnetic motor generator and method using a regauging process for capturing available electromagnetic energy in the system. The device is comprised of a rotor with magnets of the same polarity; a timing wheel in....
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This project is a FM Radio based on TDA7000 and LM386 integrated circuits. What is unusual about TDA7000 IC is how it operates. It is a proper FM superhet receiver, with the usual local oscillator, mixer, IF amplifier, limiter, and phase detector. The....
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To take advantage of sunlight shining on the earth can continue to be utilized to serve as a power source so that we can at least save on electricity prices continuing to rise, below is one of a series of simple power plant can be created and used to fill....
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Building a serial servo controller to learn about electronics and assembly language as part of my hexapod robot project. Quite early on I decided that I needed more I/O channels than my ATTiny2313 that I was using at the time supported so I investigated some....
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Circuit consists of 1-2 MHz oscillator Q1, untuned mixer X1, and AF beat-note amplifier Q2. C4 is calibrated to read directly in frequency from 1 to 2 MHz, using accurate unmodulated RF signalgenerator. After calibration, unknown RF signal input frequency is....
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The circuit shows TL494 Pulse Width Modulated Step?Down Converter Circuit Schematic. With this circuit you can have circuit test such Line Regulation, Load Regulation, Output Ripple, Short Circuit Current and Efficiency test with various Vin conditions.....
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Together with a good directional antenna this high performance two-stage antenna amplifier for the VHF FM broadcast band will enable you to capture far rem...
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This is a simple circuit of Logic Probe for Tri-state Logics. This circuit can be built only in a few hours. Besides that, this circuit has some other...
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This is the design circuit for a Colpitts-crystal oscillator circuit. It is suitable for low frequency crystal oscillator circuits. Using the 2N3823 JFET, this circuit has excellent stability because the temperature will not vary the 2N3823 JFET circuit....
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So, after yesterday`s post about The Demon Machine I decided it would be fun to play around with the BBC Micro Model B and so I plugged it in and powered up. The familiar two-tone boot sound played and the machine was on. About 15 minutes after power up....
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This document presents technical details, hardware and software of a complete imaging system which uses a fast CCD sensor and a 41 Msample/s A/D converter to acquire full-frame 12 bit/pixel digitised images with a time resolution of 1.25 ms/image. The noise....
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This is a TMP01 Temperature Sensor Transmitter circuit. This circuit is used in industrial environments to transmit the signal differentially on a wire pair....
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This circuit is intended to indicate the power output level of any audio amplifier. It is simple, portable, and displays three power levels that can be set to any desired value. For a standard HiFi stereo power amplifier like the 25W one described in these....
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found out the hard way why the 6v EQ-5 hand controller should not be connected to 12v by accident. It only took, literally half a second to kill my hand controller. After some examination it became obvious that I had destroyed the large 40 pin micro....
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This is an astable multivibrator (oscillator) circuit using CMOS inverter. This circuit uses CD4007 or MC14007. This circuit has operating frequency range of....
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Before the advent of broadband communications receivers with synthesized oscillators, high-grade, hamband receivers used crystal oscillators and a variable IF to cover relatively narrow (500-600 kHz) frequency segments. The schematic shows a circuit that....
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Those who are looking for a unique gift of sorts for Christmas and New Year. Certification this project create a predilection certainly for the....
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This is a simple schematic which can be assembled to control a lamp with a Sony TV remote control. Circuit uses a PWM signal connected to photocoupler which isolate the power part from microcontroller. Power part has very interesting solution on how halogen....
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This page documents instructions for use of the Innovatia Renesas M3850A microcontroller programmer. The following design uses a DB-25 type parallel-port cable, and requires MS-DOS 6. 22 or earlier. This is because Microsoft Windows restricts access to the....
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The CDCF5801 provides Clock multiplication from a reference Clock (REFCLK) signal with the unique capability to delay or advance the CLKOUT/CLKOUTB with steps of only 1. 3 mUI through a phase aligner. For every rising edge on the DLYCTRL pin the CLKOUT is....
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This project is an older design and has most likely been superceded by a newer one. However, it is still a viable design and useful for your home-brew synth. Sorry but most of these do not have circuit descriptions, parts lists or PC board layouts (They....
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Circuit for Grundig 5441 tv. If you have any problem regarding this issue come back with more information about the problem, we will glad to assist you By entering the Fixya site you declare that you have read and agreed to its Terms. You may NOT copy or....
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Here`s the circuit diagram of a four RF stage FM transmitter. The stages are, very high frequency (VHF) oscillator built around a HF transistor BF494, a pre- amplifier built around transistor BF200, a driver transistor 2N2219 and a power amplifier using....
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This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your luggage, burglars breaking into your house etc. The alarms goes ON when a thin wire, usually as thin as a hair is broken. The circuit is straightforward. It....
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or take one FET, one Zener, and one resistor. No FET and resistor needed if the current is in the range of specs for a zener. Or take a P-channel....
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Many audiophiles reject equalizers for various reasons, some of which relate not to the EQ circuit itself (or algorithm) but to the surrounding "glue" of op-amps, transistors, A/D and D/A converters etc. The only "passive" EQ I`m aware of is horribly....
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RF detector circuit, RF amplifier circuit, auto gain control circuit (AGC) etc is already built inside the IC due to which you can easily build a high quality and sensitive am receiver using this IC. The ZN415E IC is an advance version of ZN414 IC, the....
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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. This circuit is very easy to explain: When the test....
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Precision frequency counter/tachometer. The ICM7207A provides a 1-second gating window and the store and reset signals. The display reads hertz directly. With pin 11 of the ICM7207A connected to V+ the gating time will be 0. 1 second, which gives tens of....
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An 30 Watt audio amplifier circuit with TDA2040 shown here. TDA2040 is class AB amplifier monolithic integrated audio Pentawatt available in the package. The IC has a low harmonic distortion, cross low over the distortion and has a built in short circuit....
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The circuit given here is of a regulated dual power supply that provides +12V and -12V from the AC mains. A power supply like this is a very essential tool on the work bench of an electronic hobbyist. The transformer T1 steps down the AC mains voltage and....
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The circuit charger is equipped with voltage output settings, so that we can regulate how much voltage to charge the battery. And the settings using the potentio making it easier for us managing voltage up to a mV. See charger circuit below : You are reading....