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Shown for the multi-output power supply circuit. The circuit uses the transformer secondary winding and 4 respectively 7812,7805,7905,7912 + 12V, + 5V, -5V and -l2V 4 groups independent output voltages. Each group has a separate output voltage switching....
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As shown, this is a closed loop made up of three identical composition of the Schmitt trigger, end to end. Each flip-flop delay is td l. 1 (RP + R) C, i.e., the voltage on C td..
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The proximity sensor works on the principle of transmitting a beam of modulated infra-red light from the emitter diode LED2, and receiving reflections from objects passing in front of the beam with a photodiode detector Dl..
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The square wave is generated by a 7555 timer operating with a supply of 10V and thus generating exactly this voltage as output voltage. With the single quadrant multiplier (RC4200, Fairchild, obsolete) the two quadrant square root circuit is formed. 10V of....
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If you want to make an ultra-multipurpose, generic microcontroller board, then what I`ve covered already is enough. It`s the bare basics that will get....
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Circuit works as follows: Computer logo conditioned clamor control circuit shown in Figure 1-58, the main chip AT89C52 microcontroller with Levin. Switched power source when, 2..
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An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow. The sine wave or sinusoid is a....
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The dual-channel PCA9540 I2C multiplexer often breaks up an I2C or SM bus or allows you to use devices with the same addresses on the same bus. When the PCA9540 initially powers up, it comes up in a state in which both channels are deselected. The I2C- or....
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When mains is absent, relay RL2 is in deenergised state, feeding battery supply to inverter section via its N/ C contacts and switch S1. The inverter section comprises IC2 (NE555) which is used in stable mode to produce sharp pulses at the rate of 50 Hz for....
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A pair of diodes and a quarter-wave transmission line are used as an automatic TR switch. D1 and D2 conduct during transmit periods, short- circuiting the scanner input. In this mode,-the K-wave line appears as an open circuit...
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This continuity tester gives a beep sound if detect an electric current conduction between its probes. Here is the schematic diagram of this audible....
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Generates force field of high-intensity sound inside car, painful enough to discourage thief from entering car after tripping alarm switch by opening door. Circuit produces square-wave output that sweeps up and down in frequency. Modulation is provided by....
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Resign a complex solution using few external components, resulting an low cost application that provide a high precision measurement. This Digital thermometer microcontroller project use watchdog timer function to measure temperature. The WDT on all....
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Electric valve control circuit consists of the following three parts: main lines, control lines, and power consumption brake line aa. The main circuit includes a power switch v..
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Energia is a rapid prototyping platform for the Texas Instruments MCU Launchpad. Energia is based on Wiring and Arduino and uses the Processing IDE....
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Martin KH6MB designed an antenna tuner for use with end-fed half-wave vertical antennas for use during annual feld day events. The tuner is capable of handling bands from 10-40 meters at legal limit power. The rotor shaft of the capacitor is attached to the....
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Circuit shown in Figure, + 24V power supply is obtained by the electromagnetic chuck 110V power down. When the electromagnetic chuck circuit make contact JK closed magnechuck C..
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Figure 1.88 using the loudness of several tapped the potentiometer control circuit. In FIG. (A), and between the tap and the input of the potentiometer and the land respectivel..
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A single power amplifier circuit LM2876 crrL constituted. VTf external transistor to form the emitter type to provide neutral level (7 feet) for the LM2876, guaranteed lC relia..
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A aerial affection ability accumulation with a continuously capricious stabilised achievement adjustable at any amount amid 0 and 30VDC. The ambit additionally incorporates an cyberbanking achievement accepted limiter that finer controls the achievement....
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Hi to all So I have come to a point where I was able to think about a certain circuit design and write the Assembly code program for my 3 level mini ....
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The circuit was meant to be powered by a power supply, which is why there is no transformer, rectifier, or filter capacitors on the schematic. There is no reason why you cannot add these. To use the circuit, hook it up to a power supply/plug it in. Then,....
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I had always assumed that dynamic braking would be most effective at higher speeds. However, actual tests using a Faulhaber (micro mo) gear motor showed that the brake would hold a motor almost stationary. These gearmotors are so well made that I can turn....
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For several years now, a rear fog lamp has been mandatory for trailers and caravans in order to improve visibility under foggy conditions. When this fog lamp is switched on, the fog lamp of the pulling vehicle must be switched of to avoid irritating....
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Good Quality FM transmitter circuit for your amplifier, gives you a pretty good signal strength up to range of 500 metres having a power output of about 200 mW..
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With an an input sinewave on the left amplifier base, here`s what happens: The collector output rises above or falls below 6. 6 volts. Of course, the amplifier increases signal level and inverts the signal. Because the output is roughly centered, the chances....
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We can create Crystal Colpitts oscillator using a parallel mode crystal and a transistor. The circuit shown by the following figure As an inductance, this....
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Most all work off of some flip-flop like principle. And while I could have suggested a true flip-flop chip, I thought it would be cooler if you could use a 555 timer chip (which contains a single flip-flop and a couple of comparators). After scouring my....
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This circuit takes two separate line-level stereo (L & R) signals and combines them into one stereo (L & R) output, thus avoiding the need to switch betwe....
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This highly integrated GPS receiver IC improves upon earlier-generation devices by including more components in a smaller package with a reduction in power consumption...
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KC2ZPL Web Design, electronics, HAM radio, CW, homebrew construction, general electronics, high voltage, experimenter`s web page...
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This Hi Fi stereo preamplifier circuit is congenital with TDA1054 IC from SGS. TDA1054 is a 16-pin DIL amalgamation and integrates 2 abstracted preamp circuits. It is a low babble preamp with little or no botheration in the building process. The aboriginal....
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The AD654 is a monolithic V/F converter consisting of an input Amplifier a precision Oscillator system, and a high current output stage. A single RC network is all that is required to set up any full scale (FS) frequency up to 500 kHz and any FS input....
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Low-Pass and High-Pass audio output signal filters. Additional Sound Source Low Pass filter and experimental original design puls-gate signal filter ("processor"), both of which have independent or linked together Voltage Control input option. The....
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A. The maximum input voltage of 10V. OP amplifier A, to give ten of 10V reference voltage, and its stability is mainly determined by the Zener diode characteristics, mining com..
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PC parallel port was never designed to provide any output power to divices connected to it. it was only designed for connecting printer to your PC. But in this weird PC business everything changes. Suddenly the parallel port have become a port where you can....
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The circuit, a general-purpose system with many uses, vocalizes 59 allophones contained in the speech processor. After filtering and amplification, its pulse-code-modulated output can drive an 8-!l speaker. The processor"s address pins, Al to A6, define 64....
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Simple PWM lamp dimmer using NE555 timer IC. 555 timer IC wired as variable duty cycle astable multivibrator for controlling the brightness of the lamp....
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The aim of this project is to transmit analog sound from a commercial mp3 player digitally using a store-bought laser pointer as the transmitter. This will be achieved mainly by performing analog-digital conversions, and by using a digitally phase-locked....
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This circuit checks the reliability of appliances so that the equipment may be used safely. The test circuit must be plugged into a properly wired three terminal wall outlet. When a two-lead or three-lead appliance is plugged into circuit outlet SOI, neon....
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This will drive a total of 42 LEDs. It is based on the assumption that the forward voltage of your LEDs is ~2. 2V, and that they will be bright enough with a forward current of ~21mA. If yours are a lot different, I will have to modify the design. The 2n3904....
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This Project Line Following Autonomous Robot is based on 8 bit Microcontroller AT89C2051. This Robot follows the black line which is drawn over the white surface or it follows the white line which is drawn over the black surface. The infrared sensors are....
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The TMP03* is a complete temperature data-acquisition system on a monolithic silicon chip. Including a silicon-based sensor, internal voltage reference, and sigma-delta A/D converter, it fits in a 3-pin (power, common, and output) TO-92 transistor package.....
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McCAD E.D.S software, a complete family of integrated electronic designs systems for MS Windows and Macintosh OS platforms. McCAD Electronic Design Systems offer a choice of design environments with a wide range of system configurations tailored to the....
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The acronym FACTS stands for “flexible ac transmission systems.â€These systems add some of the virtues of DC, i.e., phase independence and fast...
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The circuit given here produces an alarm similar to the police siren. When you press the push button switch S2 capacitor C1 will charge and this will make the transistor Q1 to ON slowly. When the switch S1 is released the C1 will discharge and the transistor....
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A very simple circuit for FM receiver, no IC required, and only a single transistor. I`m not sure whether this transistor works or not, I`m going to try this out. Have you guys seen this before It is a regenerative or super-regenerative simple radio....
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The following article is a follow-up application note to `Defining and Testing Dynamic Parameters in High-Speed ADCs, Part 1`. It details test conditions and setup recommendations to efficiently measure the dynamic performance parameters of high-spee....
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Common non-sinusoidal oscillator circuit, waveform and frequency formula - pulse wave oscillator - blocking oscillator transformer ..
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This is my second-generation guitar reverb circuit. The fidelity is much improved over the earlier design, it is suitable for use as a front-end to a guitar amplifier. This circuit features clipping indicators on the preamp and reverb recovery stages,....
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The EB9025/20 is an evaluation and reference design platform for the GENLINX¾ II GS9025 Receiver, the GS9020 Serial Digital Video Input Processor, and the GS9028 Cable Driver. The board performs the function of serial to parallel conversion and EDH....
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It seems that guitar fuzz boxes have been around since the beginning of rock, and have seen little improvement over the years. This one is somewhat different because rather than simply distorting the sound, it also pulses in step with the peaks of the....
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The output goes high when a preset temperature is exceeded. A fixed half-supply reference voltage feeds a reference..
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A generalized circuit diagram of the two-pole state-variable active filter is shown. The state-variable filter can be inverting or noninverting and can simultaneously provide three outputs: low-pass, bandpass, and high-pass. A notch filter can be realized....
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If the load resistance RL is reduced or load terminals are shorted acciden tally, a very large load current will flow. It may destroy the pass transistor Q1, diode or possibly some other component. Fuse protection will not prove adequate because the....
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This preamplifier has a built-in regeneration control boost gain selectivity. CI is a single or multi-gang AM broadcast-band tuning capacitor. LI is a ferrite loop antenna, tapped at about 15 to 25% of total turns. This circuit should prove useful for....
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CP2128 is a low noise, fixed frequency step-up garden DC / DC converter, in the case where the input voltage range of 2.7 ~ 4.5V, the device can generate an output voltage of 5V to eat, the maximum output current up to 100MA. C CP2128 few external ..
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he following circuit shows about 10.7 MHz RF Amplifier And Filter Circuit Diagram. Features: capacitances of a power MOS-FET become significant, ....
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The Atmega8 microcontroller from Atmel has plenty of digital and analog input/output lines. It is the ideal device to develop any kind of measurement equipment. A pre-requisite for this article is that you have the GCC AVR programming environment installed....
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In the voltage to time conversion section, the analog input voltage is fed to the attenuation circuit. The attenuated signal is compared with the the ramp signal generated by the ramp generator given in the block diagram by the input comparator `C1`.....
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You are asking how to connect up some lights so that when the phone rings, they flash. This is very useful in a situation were there is lots of noise and it is impossable to hear the phone, such as a workshop. Here is such a device. The ring detect part of....
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In the video system of Figs. A and R, a single coaxial cable carries power to the remote location, selects one of eight video channels, and returns the selected signal. The system can choose one of several remote surveillance-camera signals, for example,....
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Have already gone through 3 stages till a few days ago in the developing of street lamp control device of solar energy: First generation function simple and crude, turn on or off light, control, need, connect light sensitive in conformity with device,....
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The mini condenser microphone converts sounds into an electrical signal. Resistor R1 provides bias for the condensor microphone`s internal amplifier transistor. The 2N3906 PNP transistor acts as a low noise microphone input amplifier. The 10K gain....
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The dynamic mixer combines two audio inputs by adding the primary signal, Input A, to a gain-controlled signal, Input B..
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This circuit is a very simple manual analogue light controlling desk which outputs standard 0-10V control signals suitable for controlling professional light dimmers and other lighting equipments. The output of the controller shall be a steady DC voltage....
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I`ve managed to complete the first phase of my motion-controlled photography rig: setting up a pair of bipolar stepper motor controllers. This is the most important non-mechanical part of the project, as without control of motors there can be no....
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A mouse has two axes: "X" and "Y". When the mouse is moved "horizontally", the "X" wheel inside the mouse rotates. When the mouse is moved "vertically" (upon a surface), the "Y" wheel inside the mouse rotates. For arbitrary mouse motion, the "X" and "Y"....
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Drive and two-phase hybrid stepper motor`s connection with the four-wire system, the motor windings in parallel and series connection, and connection method, high-speed performance, but the drive current is large (for motor winding current of 1. 73 times),....
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The range of this FM transmitter is around 100 meters at 9V DC supply. The circuit comprises three stages. The first stage is a microphone preamplifier built around BC548 transistor. The next stage is a VHF oscillator wired around another BC548. (BC series....
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This circuit passes frequencies in the 300Hz - 3. 1kHz range, as present in human speech. The circuit consists of cascaded high-pass and low-pass filters, which together form a complete band-pass filter. One half of a TL072 dual op amp (IC1a) together with....
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I recently purchased 10 SLM1608 (SLM1606) LED matrix display units from Ebay (you might also contact the seller directly at [email protected]). These are 16x16 LED matrix units with a green and a red LED per pixel allowing each pixel to be switched to either....
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This is a project from the dim and distant past that has proven to be a real winner. I have used it as a basis for an 8 channel proportional R / C (AM) and 145MHz FM chat box. Recipients very simple and is shown below. This consists of a single transistor....
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This is a Servo System Controller circuit. This circuit is used to control a servo motor remotely. This circuit uses the 555 and requires only six extra...
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This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will accommodate all the usual types of normally-closed input devices - such as magnetic reed contacts, foil tape, PIRs etc. But it`s easy to add a normally-open trigger.....
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This audio limiter circuit is easy to build, works with BA741 8pins or 4pins so pay attention and uses a symmetrical power supply. When the audio input lev...
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A voltage regulator is designed to provide a fixed voltage to any load. Inherently this means it must provide any current through that load to satisfy Ohm`s Law of I = V/R. As R approaches zero, for example when the output is shorted to ground, for a fixed V....
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The following circuit shows about 555 Timer IC For IR Detector Circuit. Features: duty cycle of 0.8mSec, frequency of 120Hz and 300 mA peak ....
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Boosters are not buffers! While it is possible to make a booster that also provides a buffering action, the vast majority of the boosters commercially available ready-made or kits, do not have the proper design to be buffers. A buffer should have a high....
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In Fig.1 see a DC current ? sensing switch, in which the current is applied from an 8 to 16 Volt supply. The R1 value is chosen so that it generates roughly 100 mV at the required trip current. In Fig. 2 shows how the above circuit can be made to act as a....
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This is a high fidelity external USB Soundcard / USB Headphones project that can be built for your PC or Mac. It is based on the latest PCM2706 IC which functions as a high quality, crystal clear 16-BIT Stereo DAC. It is a single chip digital-to-analog....
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The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas. This particular design is optimized....
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This was my first sucessful project with a PIC chip. I used a 16F84 with a 10MHz resonator with built in caps. Click here to view the source code to this project. The code is written in Hi-Tech C. Click here to download the source code to this project. File....
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Video designs are often pressed to operate on the lowest possible rail voltagesa simple result of the trend towards lower voltage logic and the advantages of sharing supply potentials wherever possible...
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Based on one-chip computer data acquisition and wireless to receive and dispatch studying systematicThe technology of data acquisition is the important branch of information science, it not merely employs in intelligent instrument, and in modern industrial production, military science is used widely, no matter proceeding control, condition monitoring, or....
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The FTDI DLP-USB245M is a USB-to FIFO interface module that simplifies the control of multiple steppers by a PC..
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The mixer circuit above has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series resistor. As with any mixer circuit, a....
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A low pass filter is merely a stable state-space system that has an input and spits out an output. If the input is a quasi-periodic signal, then the output would simply be the same quasi-periodic signal with a phase shift. Only difference would be that this....