Popular Circuits Page 204
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As you can see in the circuit diagram, this electronic project require few external electronic parts. The maximum output current that can be provided by this PWM current-control stepping motor driver IC is up to 1. 5 ampere. The setting conditions for the....
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This circuit simulates the sound of an American police siren. IC2 is wired as a low frequency astable that has a cycling period of about 6 seconds. The slowly varying ramp waveform on Cl is fed to pnp emitter follower Ql, and is then used to frequency....
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Frequency shifting keying technique is used to transmit binary data. The circuit diagram with description fsk demodulator used 565 IC for frequency shift keying...
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The TEA5711 is a high performance Bimos IC for use in AM/FM stereo Radios All necessary functions are integrated: from AM and FM front-end to AM detector and FM stereo output stages. ..
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The White`s Classic I was a very simple, easy to use machine, ideal for the entry-level detectorist to pick-up-and-go. It was a simple detector with no bells or whistles, only an on/off switch and a turn knob for a discriminator. It did not have much depth....
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A pre-requisite for this article is that you have the GCC AVR programming environment installed as described in my "Programming the AVR microcontroller with GCC, libc 1. 0. 4" article. If you want to avoid troubles with the installation you can of course use....
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DC drive for a Universal motor is shown in figure below. In order to supply DC current to the motor, a diode bridge has been added around the motor. The motor....
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A sense of three-point oscillator, also known as Hartley oscillator, the Colpitts oscillator with similar, but the feedback circuit is composed of two series inductor and a shu..
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For this scheme to have satisfactory signal-to-noise and frequency-response parameters, the clip, connecting cable, and amplifier must m be attached parallel to the signal wire and must be as long as is conveniently possiblean inch or moreand preferably....
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This decibels meter circuit responds for sound pressure levels from about 60-70 dB(Decibels). That sound is picked up by an 8 ohm speaker, amplified with a transistors stage and LM324 op-amp section. For audio signal input source, a dynamic microphone can be....
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The values of LM56 Thermostat project Circuit diagram of R1, R2 and R3 for the points of travel, VT1 and VT2 can be determined using the subsequent equations. This thermostat of electronic circuit with IC LM56 diagram what simple project, you can use as....
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This ac to dc power supply can output 5A in continous operation and 12A peak current. This kind of dc power supplies uses a PCB so you can use two case typ....
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To convert the MaCom 10GHz "White Box" (or "Whitebox" for the search engines) unit for ham radio use. Since we`re following in the path of others who`ve already modified these units, there isn`t much new here in the way of modification instructions, but I`ve....
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The strobe controller is essentially a stand-alone device, even though it is part of the console PCB. It connects through a two-wire cable to the remote strobe head. Control, input source selection and output routing are on the console. The input to the....
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Figure 3-118 automatic acceleration control circuit. It uses the male contactor time relay, the motor starts automatically from a low speed by the speed the transition to high-..
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As shown in the figure shows the actual application circuit TDA8351/8356, when the 50V VFB 60V, VFB in series with the input of a 33 resistor. Signals are input 1,2 feet, these..
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This single-stage amplifier (using a 2N2222 or 2N3904 general-purpose transistor) is useful for interfacing test in..
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The schematic for this project is not terribly complex, however it is very important that you understand the circuit board and how it operates because of the high voltages that are generated. Below is a `rough draft` schematic of the camera used for this....
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SOS Alarm centralized control circuit can be used to call a hospital bed, can also be used in multi-storey buildings, dormitories, warehouses and other places of anti-theft alarm. The circuit shown in Figure l3-64. The circuit shown in three-channel..
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The old and omnipresent NE555 can be very good at something it was not meant for: driving relays or other loads up to 200 mA. The picture shows an example circuit: if the input level rises over 2/3 of the supply voltage - it will turn on the relay, and the....
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A light dimmer that uses TRIAC & DIAC. Controls the brightness of light bulbs. Based on the standard dimmer circuit. A few additional parts were added to eliminate flickering at low light level. Works better then commercial units...
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Here is a simple circuit based on IC uA 741 that can be used to pickup voice from telephone lines without even contacting the line. If a high impedance magnetic core is placed near a telephone instrument or near one of the telephone wires, it picks up....
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An often neglected area of study in modern electronics is that of tubes, more precisely known as vacuum tubes or electron tubes. Almost completely overshadowed by semiconductor, or "solid-state" components in most modern applications, tube technology once....
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This Magnitude Comparator can be used perform comparisons of two 8-bit binary or BCD words. The output provides both a P equals Q function or P greater than Q function. A Magnitude Comparator would be considered standard logic or glue logic when a discrete....
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A circuit that offers visual indication of fluid level in a vessel, with a switchable audible alarm. Example uses would be to monitor the level of water in a bath or cold storage tank...
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Normally, Thereminworks by detecting hand proximity using capacitive coupling method. A Theremin circuit shown in the schematic diagram below use different method to control the pitch. The oscillator of this tone generator, both the volume and frequency are....
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The Panasonic transducers are no longer available, but the design is still interesting as an example. J1 is the connection to the RCX. D1 - D4 form a bridge rectifier to obtain local power from the RCX which is stored on C7 and regulated to 5V by U1, a low....
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Conversion of triangle wave shapes to sinusoids is usually accomplished by diode-resistor shaping networks, which accurately reconstruct the sine wave segment by segment. Two simpler and less costly methods may be used to shape the triangle waveform of the....
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Using the LMD18200 3A H-Bridge designed by National Semiconductors for motion control applications can be designed a very simple motor controller electronic project. Ideal for driving DC and stepper motors; the LMD18200 accommodates peak output currents up....
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These circuits provide o,vervoltage protection in case of voltage regulator failure or application of an external voltage. Intended to be used with a supply offering some form of short circuit protection, either foldback, current limiting, or a simple fuse.....
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A useful operation for the cars is delayed extinguishing internal lighting cabin of passengers, after close some door of car. Certain cars allocate this operation from their constructor. Oldest sure do not allocate such operation. This delay makes this....
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This circuit in below uses two quad voltage comparator using IC LM339 to illuminate a series of 8 LEDs indicating volume level. Each of the 8 comparators is biased at increasing voltages set by the voltage divider so that the lower right LED comes on first....
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The loop can be any type of hookup wire, with a maximum resistance of about 90K. Using very thin wire (40AWG, for example) will make a very sensitive trip wire, but will shorten the distance it can be strung due to the high resistance...
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use microcontrollers to communicate in serial between the microcontroller (AVR-006 kit) with a computer. In this project we will use microcontroller AVR-006 from Circuits-Home. Before creating the program, the first job we have to do is understand about the....
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This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you like and consumes very little power. The mixer is shown with two inputs, but you can add as many as you want by just....
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This circuit uses the CA3207 sequence driver and CA3208 segment latch-driver in combination to drive display devices of up to 14 segments with up to 14 characters of display.
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The schematic above illustrates dividing a crystal oscillator signal by the crystal frequency to obtain an accurate (0. 01%) 1 second time base. Two cascaded 12 stage counters (CD4040) form a 24 stage binary counter and the appropriate bits are gated....
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The ability to reduce power losses is most important Describing here a new ultra-high-performance topology expected to be the foundation for next-generation dc-dc power supplies in high....
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Try this on for size. This is Tesla`s own words. From: ""On Light and Other High Frequency Phenomena"" ""ON PHENOMENA PRODUCED BY....
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The oscillator circuit (see Figure 1) involves two unity gain phase shift stages, A1 and A2, in tandem and a gain stage, A3, with back to back diodes and resistor network providing non-linear negative feedback. At a particular frequency (determined by RT and....
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Circuit diagram is a very simple circuit-level indication, with 10 Led. Used a series of half-wave rectification of precision around IC2 TL071, with a single. LM3915 IC is used to control the led, as an indicator VU Meter. LM3915 can be controlled 10 led..
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LM12 operational amplifier can output currents up to 10A. The LM12 in encapsulated in TO-3 with 4 pins, can support up to 800W and has enough internal prot....
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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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Because of its high amplification factor and built-in power-output stage, an integrated power operational amplifier makes a convenient driver for ac motors. One op amp can be configured as an oscillator to generate the required ac signal. The power-output....
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As shown is 555 more cars with alarm circuit, mainly consists of a 555 and a quad 2-input NAND gate circuit. At the time of low oil pressure and brake pressure is too low, the ..
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How to handle digital input/output(I/O) in Avr Microcontroller? Explained using basic programs and circuit to glow an LED,generate stepper motor sequence,read push button switch and key debouncing....
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This is a very useful project for anyone working in electronics. It is a versatile power supply that will solve most of the supply problems arising in the everyday work of any electronics work shop. It covers a wide range of voltages being continuously....
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Today i want to share with you all my water sensor. This is my second successful project when i started with electronic hobby. This circuit is useful for your plant. How it`s work simple. It will beeping when your plant soil is dry and stop when it detect....
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Standard Colpitts oscillator Q1 with emitter-follower Q2 gives dependability and adequate isolation from later stages Zener regulation provides stability even with weak battery Output is about 0. 7 VRMS. Low-level parasitic oscillation may occur about 150....
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Circuit shown in Figure secondary N3 center tap and transformer T common point diode VD2, VD3 positive and capacitance C2, C6, C7 and negative electrode capacitance C9, C10 and..
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A servo controller for controlling a servo motor from the serial port using a PIC Microcontroller. Project includes source code description and schematics....
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The schematic shown below is a 555 timer circuit. NE555 is a famous IC comes in 8 pin dip plastic package. There is a huge list of 555 IC circuits due to which this IC is very popular among electronics hobbiests, students and experimenters. The circuit....
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Timelord, one of our top member is working on a great project: a complete apartment air conditioning based on airflow. You can check out his idea here http....
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FM Radio project detailed here is based on SONY 1619 chip. This is single chip radio means, everything from Antenna to Speaker is done by Sony IC, specially designed for AM/FM Radios. Radio is designed on a double sided PTH Board and works on USB power.....
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Electrical flow through the saddle j pounds. TV added in a controlled manner Qian Mountain amphipod species lI- ii ~ mi pulsating chord electric Ir:., This electric IE again. a..
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Momentary output : One of the relays RE1...RE4 is ON as long as CH1---CH4 is pressed from transmitter. Latch output: when one of channels CH1...CH4 is pressed from transmitter RE1...RE4 are ON as long as other CH is pressed from transmitter. Valid....
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Many function generators are based on a rectangular waveform generator that consists of a Schmitt..
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Normally begin to learn about electronics power supply from the battery, for example, 9 volts, 1.5 volts, 6 volts etc. But there are disadvantage that when....
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Wien bridge sine-wave oscillator using two RCA CA3140 op amps cover» 30 Hz to 100 kHz with less than 0 percent total harmonic distortion. The 10k pot is adjusted for the best waveform..
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This VGA to TV converter is designed to connect VGA card to a television which has suitable 21-pin AV connector for RGB input (called EURO/SCART/Peritel connector). if you Tv does not have this kind of connector, then you can`t use this circuit.
The....
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This resource contains step to step information to make AVR microcontroller programmer with suitable circuit diagram. This programmer able to program 8051, AT89XX, AT90XXXX, 8031 family microcontrollers....
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This is one of the most basic 555 circuits. This circuit is part of this chips datasheet, complete with the math needed to design to specification, and is one of the reasons a 555 is referred to as a timer. The green LED shown on the illustration lights when....
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This simple circuit is sure to have the police beating a path to your door - however, it has the added advantage of alerting you to their presence even before their footsteps fall on the doormat...
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The unit is powered directly from the 120 volt AC line, with no power transformers. Filaments are wired in series, with the total adding up to 117 volts (35 + 35 + 35 + 12). The 35W4 forms a half-wave rectifier, which is filtered by a three-stage RC network.....
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The NJM3772 is a stepper motor driverwhich circuit is especially developed for use in microstepping applications in conjunction with the matching dual DAC (Digital-to-Analog Converter) NJU39610. The NJM3772 contains a Clock oscillatorwhich is common for both....
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This circuit will allow you to turn on any piece of equipment that operates on 115 volts ac. The reciever circuit is based on the Radio Shack infrared receiver module(MOD), part number 276-137. It is also available from some of the other sources listed on my....
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A sound origin direction indicator comprising a flat square-shaped form having four sound transducer/amplifier units mounted at its four corners, four rows of solid state lamps radiating from its center to the corners and an electronics system attached to....
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The series of light switches this time slightly different from the voltage of work. The series of light switches can work directly on the AC power network. Light switches are using the main component of TRIAC and LDR. The circuit is very simple and the....
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Schematic diagram and description of 2 watt audio amplifier circuit using TDA7052 amplifier IC. This is a super simple audio amplifier circuit. ....
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The ICL8212 is connected as a programmable zener diode. Zener voltages from 2 V up to 30 V can be programmed by suitably..
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Figure 1-123 is an internal block diagram of the TDA3810 o The circuit can operate in three modes of operation: (1) may be mono channel stereo signal into an analog signal; (2)..
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The transmitter for the wireless headphones is built around a CD4046 CMOS phase-locked loop, coupled with a driver transistor, and a pair of infrared LEDs. Although the CD4046 is comprised of two phase comparators, a voltage-controlled oscillator (or VCO),..
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As shown, the control terminal 5 feet and 555 threshold end 6 feet is actually two internal input voltage comparator I, as long as 6 feet voltage is higher than 5 feet 5mV, the..
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This is a circuit diagram of the triangular wave producing circuit. We can produce the triangular wave with a series of two Op-Amp. You can use the LM741 op-amp. Op-amp first (left) is a series of comparison (comparator) while the Op-Amp circuit second....
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Following a highly successful Kickstarter project and over a year of development, HexBright, billed by its creator as the world`s first open source Arduino flashlight, is now in production with initial shipments planned for December. HexBright, which we....
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Publishing this one in a hurry, in case it is useful to our friends in Japan. This is a simple Geiger counter circuit. It does require some speciali....
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Diagram 2 shake tube n. Capacitance C. Trigger voltage rectifier filter element. H is a trigger voltage transistor amplifier circuit, three pull tube n, U, v. Composition trigg..
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So the concept here is pretty simple. I wanted to mount a microphone on a stick with an LED and design a circuit that would react to a large amount of noise on the microphone input (blowing) to turn off the LED. As you might expect, the schematic for this....
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The water sensor circuit is based on a 555 timer circuit and come common electronic components. The water sensor is made by two metal electrodes arranged very close that a drop of water (liquid) will bridge them. If the liquid ( water ) is very pure you may....
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The Lorenz system is one of a few standard oscillators commonly used to explore chaos [1]. An accessible description of its mathematical features and chaotic dynamics is presented by Thompson and Stewart [2]. This important system was originally developed as....
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Common non-sinusoidal oscillator circuit, waveform and frequency formula - sawtooth oscillator - use blocking oscillator ..
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The circuit amplifier and an attenuator control video detector consists of a composition for synchronization channel,..
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When I purchased the salve dial, it came with no instructions, packaging or other details. The only markings (other than five decades of grime) were those on the face (SMITH SECTRIC, ACELEC SYDNEY), and some markings on bracket holding the mechanism together....
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This amplifier comes with high fidelity (Hi-Fi), high sensitivity, low power consumption and low distortion. It will be nice for your high fidelity sound system. :) Make a PCB in very easy steps. ! Create your PCB design using PCB designer software like....
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Three 555 IC timers are used in this circuit to construct a simple delayed-pulse generator. IC1 acts as a waveform shaper to produce a rectangular waveform. IC2 produces a delaying pulse to trigger 103 on the trailing edge of the delaying pulse. Rl controls....
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Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log potentiometer (dual gang for stereo) and a switch to cope with the various sources you need. Q6 & Q7 must have a small U-shaped heatsink. Q8 & Q9 must be mounted on....
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A school drama needed lamps that automatically turned on and off when spot lights did the same. Lamp switching had to be wireless, durable, dependable, simple and inexpensive. With stage and spot lights off, very little light falls on the CdS photocell, so....
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