New Circuits Page 25
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hi here is new models 3 digit cc and ca dispaly multiplexed 3 didgit voltmeter chip TC7107(ICL7107) Thumb switch with commom pin bcd and hex regards....
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This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is....
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Figure 2-33 (a) is the action schematic diagram of the robot closing to the object. When there is no objects in front of the robot, it will go forward in the straight line; when there is an object in left or right side of the robot,it will turn left or right....
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This page was created in response to all the email I receive, on how to read a schematic. Learning to read a schematic diagram, is similar to map reading. You need to know which wires connect to which component and where each wire starts and finishes. With a....
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This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively....
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This a very simple and inexpensive circuit that can be used to test quartz crystals. Here a Colpitts oscillator is wired used the transistor T1. When the crystal is connected between terminals A and B the circuit will produce high frequency oscillation. The....
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The intelligent temperature sensor DS18S20 from Dallas semiconductor is a calibrated precise two resp. three pin device that interfaces direchtly to microcontrollers or PCs producing Celsius readings. The so-called 1-wire protocoll (better "one DATA wire. )....
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simple and powerful FM transmitter is a interesting project using one transistor range of 100 M circuit diagram with description of FM transmitter various interesting project...
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This circuit provides a visual 9 second delay using 10 LEDs before closing a 12 volt relay. When the displace about-face is closed, the 4017 decade adverse will be displace to the 0 calculation which illuminates the LED apprenticed from pin 3. The 555 timer....
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Reduce the IC s supply current for about 50% This article presents a high reliability 1200V High Voltage Integrated Circuit (1200V HVIC) for half bridge driver applications. It....
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Circuit diagram schematics of Electronic Keys, Electronic Locks,Digital Electronic Locks,Transistor Code Locks,Combination Electronic Locks....
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Decade counter circuit is a electronic circuit to perform a sequence of numerical calculations either forward or backward calculation. What is meant by forward calculation is where the circuit will count ranging from small numbers to larger numbers. While....
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One advantage of solid-state relay (SSR) over conventional electro-magnetic relay (EMR) is its tear and wear free operation. S201S01 from Sharp is a good e....
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This power factor controller accept voltage from 90 to 268 Vac, that`s why we call it power factor controller with universal input, since any standards of mains supply in almost any country would fall within that range. This power factor controller is....
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I recently created a ""Steady Hands Game"" - it started off as·eaching the need to have a game for a cub-scout event. However after prototyping the game (on the homework board), I created a more premanent version of this game that can be used for teaching.....
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The MS6714 is a 4 stereo inputs/2-channel outputs digital control Audio Processor for the low voltage operation. Volume, Tone (bass and treble), and balance (left/right) processor are incorporated into a single chip. The MS6714 also has the loudness function....
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This FM spy telephone circuit is mounted serrial with the phone line. When is signal on the wires this transmitter will radiate airwaves thru the wires wic....
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A signal-injection circuit for control-loop analysis is flat from dc to 200 kHz, isolated from chassis ground and easily constructed with a readily available instrumentation amplifier....
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A simple circuit which is switchable between a sharp cut-off above 2. 5 kHz and a narrow bandpass around 800 Hz. In the low pass (LP) state it can be used on speech as the filter section of a direct conversion receiver. For CW operation, the cut-off....
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Farmhand I have read those few pages and am trying to digest a little more of the book! Difficult to comprehend at times that Tesla could achieve at....
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This electronic clock is composed of the LM8365 and the LDD640R displayers. The LM8365 can display the hour/minute and month/day.etc; you can set two alarm ouptuts AD1 and AD2 by pressing 12h or 24h; VDD=-21 to -6.5V, it directly drives the LED displaying;....
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This timer circuit will only run when the temperature rises above a preset level. There`s an alternative version - Repeating Timer No. 6 - that only works while the temperature is below the preset level. R7 lets you set the temperature. The value of the....
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In this electronic breadboard circuit for beginners in electronics, when the ambient light level drops below a certain level, the LED switches on automatically....
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It is actual absorbing and acceptable to be able to ascendancy aggregate while sitting at your PC terminal. Here, a simple accouterments ambit and software is acclimated to interface a 7-segment based rolling display. The printer anchorage of a PC provides a....
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This is a slightly less professional-looking version of Handmade Electronic Music, with almost identical content (and free!). See in particular Chapters 18 and 20. Layout of conductive metal strips under the breadboard performations. There are generally two....
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Also called the parallel A/D converter, this circuit is the simplest to understand. It is formed of a series of comparators, each one comparing the input signal to a unique reference voltage. The comparator outputs connect to the inputs of a priority encoder....
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Constructing a robot or should i say a vehicle dat uses 2 motors. I managed to get sum referance regarding d schematics for the circuit design but the current schematics uses a smaller motor. which draws less power and uses a much less power supply. the....
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Generators that does not use fuel to function, these generators give 24hrs of electricity as long as you want to use them. Though in the earlier days of this invention a problem was encountered and this problem is that the battery that powers the generators....
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The NCP5080 product is a high voltage boost driver dedicated to the Xenon power flashes. The built-in DC/DC converter is based on a flyback structure with an external transformer to adapt any range of high voltage demand. The external feedback network makes....
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Here is an efficient 4-stage stabilised power supply unit for testing electronic circuits. It provides well regulated and stabilised output, which is essential for most electronic circuits to give proper results. The circuit provides an audio-visual....
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Metal detector using avr tiny13. i m planning to use 555 ic to energize the coil and giving this output to tiny13 at pin2(clk1). i metal detector using 555 (9) dark sensor circuit diagram (8) 555 dark detector circuit (8) pir detector circuit diagram (7)....
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The non-sinusoidal waveform generators are also called relaxation oscillators. The op-amp relaxation oscillator shown in figure is a square wave generator. In general, square waves are relatively easy to produce. Like the UJT relaxation oscillator, the....
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Use the Microchip C18 compiler to be based around my latest USB framework libraries for both the PIC and Windows. This should provide a smoother path from this basic tutorial to more complex projects. As always I welcome your feedback and suggestions over in....
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Resistance temperature sensor (RTD, resistive temperature device) comes in NTC (negative temperature coefficient) and PTC (positive temperature coefficient)....
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This is basically how the Scorpion jammers work except that instead of sending back a shifted doppler corresponding to a certain speed, they send back a constantly varying doppler shift where some units won`t display a reading while others display constantly....
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An electronic recitification circuit. The use of large, heavy and expensive electrolytic capacitors is avoided, being replaced by an active transistor in this gyrator circuit. To avoid excess ripple output on a power supply feeding a heavy load, usually a....
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This circuit was designed to detect the approximate percentage of salt contained in a liquid. After careful setting it can be useful to persons needing a quick, rough indication of the salt content in liquid foods for diet purposes etc. This circuit is using....
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Simple, two-wire, remote monitoring unit, Three-LED level display, 9V battery powered The whole project was developed on a friend s request. Its purpose w....
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Lithium Ion charger circuit design electronic project using LM3632 controller...
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Apart from the timing functions, the two comparators of the 555 timer can be used independently for other applications. One example is a Schmitt Trigger shown here. The two comparator inputs (pin 2 & 6) are tied together and biased at 1/2 Vcc through a....
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This device is designed to be a simple, inexpensive comparator`, intended for use in a solar cell power supply setup where a quick too low` or just right` voltage indicator is needed. The circuit consists only of one 5V regulator, two transistors, two LEDs,....
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The schematic for the transmitter in this project has 4 main parts, the Arduino UNO, the sharp IR distance sensor, the XBee Wireless Modules and the 16x2 LCD. You can see how these parts are connected together to build the system we want in the schematic....
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This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games. With SW1 positioned as shown in the circuit diagram it reproduces the typical dual tone sound of....
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Provides full range of brightness control for up to 500w of lamps. Ujt Q1 provides turn. on pulses for scr-L. Stern, "Thyristors Provide New Opportunities for Electronic Applications in the Home, " Motorola Application Note AN-141, Dec. 1965. ..
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Using the FAN7710 Ballast Control IC for Compact Fluorescent Lamps developed using Fairchild`s unique highvoltage process and system-in-package (SiP) concept can be designed a very simple low cost fluorescent lamp driver electronic project. The FAN7710....
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The following circuit shows about iButton Electronic Lock Schematic diagram. This circuit based on the Atmel AT89C2051 IC. Features: power supply on board (transformer T1, voltage regulator U4), bridge rectifier VD9-VD12, 20mA current, BT1-BT10 AA batteries,....
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This circuit can be used to escape from the nuisance of mobile phone rings when you are at home. This circuit will give a visual indication if placed near a mobile phone even if the ringer is deactivated. When a call is coming to the mobile phone, the....
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his handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one-and-a-half metres. So it ca....
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A common challenge for experimenters is increasing the gain of a low level DC voltage for recording or analysis. Most instrumentation circuits require building a complicated project with dual power supplies and high accuracy components. A simple solution is....
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The circuit illustrated produces a clean sine wave signal ideal for audio testing, or wherever a good-quality sine voltage source is required. It uses one integrated circuit which is a widely-available dual operational amplifier, the Texas Instruments....
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According to the datasheet. I connected the respective color wire to the respective pin of l293D according to the following circuit diagram..
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This circuit is suitable in every situation where over-current protection is required. Here we give an example from the model train world. Every seasoned model train enthusiast knows that there is nothing worse than having to find the cause of a....
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Programming the GPS Disciplined Oscillator (GPSDO) with the QP state machine framework -, which I badly need to write up - has led to the conclusion that I`ve run out of SRAM on the the Arduino Mega 2560 system. Not surprising given that there`s only(!) 8 kB....
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This circuit is designed to operate an electrical door-release mechanism - but it will have other applications. When you enter the four-digit code of your choice - the relay will energize for a preset time period. Use the relay contacts to power the release....
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A classic amateur radio transmitter topology, the oscillator-amplifier (sometimes called master oscillator, power amplifier, or MOPA), used one tube for frequency control and another for RF power amplification, and in quartz-crystal-controlled form commonly....
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The telephone repeater or The call signal peripheral circuit to the loud than the original. It`s a circuit that we design follow the request. One of my friends ..
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This is a simple 4 W fluorescent lamp driver circuit that can be operated from a 12 V supply. The first part of the circuit includes a NE555 timer IC wired as an astable multivibrator. The output pulses from the IC are amplified by the transistor Q1. The....
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Here`s BH1417 USB FM Transmitter with built-in PLL circuit. Its low-frequency signal is converted into high-frequency, which can take any audio device with FM radio (stereo, car CD, MP3, DVD player, etc.), as a normal radio station. Transmitter power is....
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I use the lm10 IC because it has a reference voltage and that`s useful for dc power supply. With two ICs can take different output voltage and amperage. This circuit is protected from short circuit. P2 is for controlling the current at the range of 0-2A.....
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This wikibook is going to be an introductory text about electric circuits. It will cover some the basics of electric circuit theory, circuit analysis, and will touch on circuit design. This book will serve as a companion reference for a 1st year of an....
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When I started out making pickups, I had just bought a bigger lathe and had one of those mini one that I was just going to sell. I instead turned it into a wi....
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This is a circuit of a 12V to 5V converter using a 7805 regulated IC. In the previous article we have discussed about the circuit of 12V to 9V converter which can be used to convert any source of 12V DC to 9V DC using 7809 IC. The circuit mentioned here is....
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A very interesting horn driver project presented by Microchip technology is presented in this circuit diagram. This horn driver project is based on PIC16F886 microcontroller, from Microchip. This microcontroller horn driver circuit diagram is very simple and....
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Sometimes I need small high voltage power supply for my projects. And I don`t want to make special transformers. And I don`t want to use special chips for it. In internet I found very simple circuit diagram for classical step-up converter. It is base on very....
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The controller is entirely hardware based, and provides the typical sequencing for a standard 3-light traffic signal. I built this traffic light controller / sequencer when I was firstlearning electronics, and it is what I would consider a crude and ugly....
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The whole system was built in a package that was about 70mm x 96mm x 30mm which contained the TNC, transmitter, interface circuitry and a lithium battery sufficient for about 20hours of continuos operation. All in weight (including battery and antenna) was....
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Build this circuit using a Digi-Key Electronics Barrel Crystal (CA-301), 15 Mhz for a standard output frequency of 150. 00 Mhz. If you want to customize the frequency, follow the directions below. I usually build this circuit to operate between 150 to 165....
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Hello, I`m trying to simulate a 10MHz Colpitts Oscillator using an OPAMP, but i`m not getting the expected outcome, the frequency is not 10MHz and the ....
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Getting the right amplifier loop gain is the major problem in producing a low distortion constant amplitude sine wave. However, we can solve this problem with....
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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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When supply voltage drops below a minimum threshold, it`s often good practice to disconnect the supply from the system to prevent poor performance or erratic operation. The circuit shown accomplishes this with minimal cost, board space, and complexity ( see....
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This circuit enables you to connect your camera with very long wire. The circuit is actually a video amplifiers. At the sender part, the amplifier is used to...
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Many of todays high performance FPGAs Microproces- sors, DSP and industrial/embedded subsystems require sequencing of the input power PS10 PS11. Historically this has been accomplished: i) discretely using Comparators references & RC circuits; ii) using....
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Generating long delays of several hours can be accomplished by using a low frequency oscillator and a binary counter as shown below. A single Schmitt Trigger inverter stage (1/6 of 74HC14) is used as a squarewave oscillator to produce a low frequency of....
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Hi all! I designed this circuit about four months ago, and I had so much fun with it, that I turned it into a kit. I designed the circuit, program, a....
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This is the very simple way to play a song with single 1. 5 battery. You can build this circuit for gift acceccories. When the gift opened, then a song will be played. It`s easy and cheap right. :D. It just use a single small chip which will generate a song....
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A used 250VA power transformer that was removed from equipment a couple of weeks ago. The transformer has a dual 10V AC output and a few auxiliary voltage outputs. The 10V winding is rated at 10A, I thought it would be perfect for a high current power supply....
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This simple dual digital dice is based on three low-cost ICs, a few transistors and a handful of LEDs. IC1a & IC1b operate as an oscillator with a frequen....
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The FT-736R is a V/UHF all mode transceiver. A picture of the FT736R can be seen in figure 1. This article will show how you can modify the AGC (Automatic Gain Control) circuit to disable it. When you are doing radio astronomy it ’s vital to be able to....