Popular Circuits Page 34
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1N4001 a 1Amp Silicon rectifier with voltage range of 50 to 1000 Volts and possessing features such as guaranteed high temperature soldering, high current capability, diffused junction, low reverse leakage, utilizes void-free molded plastic technique for low....
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The ISL62386 controller generates supply voltages for battery-powered systems. The ISL62386 includes two pulse-width modulation (PWM) controllers, adjustable from 0. 6V to 5. 5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V output and a....
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FGDF-3 three-phase low-temperature iron plating power supply circuit KGDF-3 low-temperature iron plating power supply device having a single-phase low-temperature iron plating ..
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This project is used as an electronic private exchange. It has two telephones, which have the intercom facility, and they can be connected to the telephone line. All the functions are controlled by the 8-bit microcontroller AT89C2051 which has an Program....
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This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of electrical supply line failure the battery takes over, with no spikes on the regulated supply.....
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Any type of flashing light on the main brake lights is prohibited and illegal in most states of the U. S. A. I`m verifying for the same here in Canada. In the mean time, use this circuit at your own risk and be aware that the possibility exists to be stopped....
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Figure A shows the circuit of a direct-trigger timing light. The trigger voltage is taken from the car`s ignition circuit by a direct connection to a spark plug. A circuit using an inductive pickup is shown in Fig. B. A trigger transformer is used to develop....
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Boost 3.5V regulator circuit With this chip can boost or build stable voltage supply to V ~ 3.V DC voltage into a DC voltage of 3.5 V, ..
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This circuit is intended as a revolution control for small dc motors as fitted, for instance, in small electric drills (..
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PicPOV is a project based on ""persistence of vision"". A PIC microcontroller blinks 8 LEDs on and off so that when waved through the air, a mes....
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The circuit in Figure 1 represents an attempt to combine the best of both worlds: the simplicity of a rotary interface and the performance of a digital potentiometer...
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Here is the circuit diagram of a magnetic proximity switch that finds a lot of applications in many fields. The circuit is based on a magnetic reed switch(S1) as the proximity sensor. A monostable multivibrator based on NE555 (IC1) and a toggle flip flop....
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This circuit was taken from a remote control tarantula transmitter operating at 49. 86MHz. The schematic can also be found at the FCC web site, if you look up the FCC ID. This operates under Part 15. 235 of the FCC rules and regulations Do you need help with....
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The circuit will produce the current relationship to within 2% using 1% values for Rl through R5. This includes variations in Rl from 100 ohm to 2000 ohm. The use of large resistors for Rl through R4 minimizes the error due to Rl variations..
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As shown in Figure is a limiting protection charger. VT transistors and resistors R3 form limiting network. Seen from the figure, the resistor R3 is the base of transistor VT e..
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To do this, I want to push a button to initiate the timer, which will then light 3 x leds. After each 5 minute segment is up, one of the LEDs should go out. Finally, when 15 mins is up, I want to ring a bell (just once) using a solenoid. Trouble is - I don`t....
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I designed up this circuit board because of a request from a visitor to my website. I also assemble the circuit board to Varify the board was correct. It does work, VERY NICELY, but I have no way to varify the accuracy of wind flow that is stated by the....
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The local oscillator at 1GHz or more to use more common collector circuit, it is not easy to produce low-frequency self-oscillation...
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This is a simple interface box to allow connecting a radio to a PC with some improvements with respect to similar projects available almost everywhere. Interfaces like this one are used to manage via PC the transmission and reception of digital signals....
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The monitor is a simple voltage comparator in which a car battery serves as the battery for operation. The input voltage to the comparator is set by adjustment potentiometer PI, which must be adjusted so that the green LED L2 is on when the alternator is....
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This function generator uses a CA3260 BiMOS op amp to petform both the integrator and switching functions. A 620-pF capacitor and 2-KO resistor shape feedback square wave to reduce spikes. Full audio spectrum, 10Hz to 20kHz, is covered with a single 100....
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Measure current on a constant current source(LM317), because I am using a 3v3 chip I also need a voltage divider to read it. Will this circuit work Or will it wreak havoc trying to increase voltage to drive current over the voltage dividers..
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Single Chip Memory Call Bell using quad 2 input NAND gate CD4011 record when any guest come in absence of us.circuit diagram with description various doorbell project...
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This is the circuit diagram of DC to DC converter based LM2596, the circuit has a single input supply and multiple voltage outputs. The circuit has an input voltage range of 15V to 40V. It has 5 outputs: 3. 3V at 1. 5A; +12V and ’12V at 50 mA each; and +5V....
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Brian and I did spot and eliminate a little problem. I believe it was probably caused by me using an old version of CadSoft`s Eagle, and then (later) a newer version. Therefore I have checked the Eagle project files in the current version (6. 4), and re-made....
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This little phono stage completely trounced my sub-mini phono preamp. The phono preamp was extremely quiet with my vintage Grado 8MR cartridge (not MC). This is not a vintage-sounding phono preamp. While it sounds pleasant and definately tube-based, it has....
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The MAX3420 is a USB peripheral controller chip with an SPI bus. This page hopefully contains enough information to help you easily make use of the device in your projects. The MAX3420 provides a very simple approach to adding a USB interface to a circuit.....
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Schematic, breadboard photo, parts list, and results of several transistor variations on the classic bipolar hbridge motor driver circuit....
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Automatic emergency lighting circuit shown, it is suitable for families install yourself. Because it uses smaller components, the price is cheaper. When the normal power supply mains, 220V AC mains voltage through capacitor CI ire.k pressure, and then by a..
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DC motor drive controller control two DC motors of any current or voltage rating, depending on the rating of the relays. The circuit also provides two shaft encoders for positional feedback to the computer, the motor control circuit is connected to an IBM PC....
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For its typical application circuit o R2, R3 is a feedback circuit to adjust their ratio, adjustable circuit loop gain o To increase the dynamic range of the circuit, the C5 and R5, R bootstrap circuit. TDA1514A boot noise suppression is achieved by..
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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 novel buzzer circuit uses a relay in series with a small audio transformer and speaker. When the switch is pressed, the relay will operate via the transformer primary and closed relay contact. As soon as the relay operates the normally closed contact....
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The following circuit shows about Alarms Police / Ambulance electronic Diagram Design. Features: simple and easy to assemble, Cheap circuit, ....
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Any stepper motor can be used as a generator. In contrast to other generators, a stepper motor produces a large induced voltage even at low rotational spe....
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You probably know that LM317 IC is used as an adjustable voltage regulator, but did you know it can be used as an audio amplifier? This is a class A audio....
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This demo board data sheet describes how to use the HV758DB1 to generate the basic high voltage pulse waveform as an ultrasound transmitting pulser. The HV758 circuit uses the DC coupling method in all Level Translators There are no external coupling....
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Using the latest generation of trench and polar power MOSFET technologies, we have developed both trench and polar P-Channel power MOSFETs that retain all the features of comparable N-Channel power MOSFETs such as very fast switching, voltage control, ease....
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The following circuit shows about LM358 IC Solar Controller Circuit Diagram. Features: also as a mobile communications base stations, convert ....
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The difficulty of connection vga of a videocard to the TV set is, that Frequency of lower case development(display) of the TV set makes 15 KHz, and VGA card - from 31 KHz and is higher. Translation of development(display) of the TV set up to 31 KHz....
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Times have changed and there is no need to keep your elaborate electronic project in an old cigar packet any longer. Today specialized dealers offer cases for almost all electronic applications you may think of. But still self-made devices often look quite....
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Yesterday I was triyng to read the infrared impulses from my electricity meter. The phototransistor I`m using, can see the IR from all the remotes in the house. but doesn`t read the blink from the electricity meter. I can see the IR blink of the meter with....
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I keep all rights to those circuits myself. You may freely build those circuits to yourself and your friends, but commercial use of those circuits is not allowed. NOTE: Those circuits are old designs from time when I was not so good in electronics than I am....
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It was one of those days that you should learn some chemistry, philosophy and literature. So I thought something like what am I going to do today I started a project I did want to make for a longer time, but for what I never could find the time and....
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I managed to salvage a couple of motors from a worn down old printer, and I`m unsure of how to get about connecting it to a breadboard and then to a Raspberry Pi. I`ve got a cobbler kit for my Pi that allows me to connect it up to the breadboard. I`m also....
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In recent years more and more, have a tendency ket demanded higher reimbursement structures with lights and music lovers in general and manufacturers of tube amplifiers. The reason, in their view is that the sound of tubes is more sweet, how rich and....
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The precision voltage-monitor chip contains a temperature-compensated voltage reference. R1 divides down the battery voltage to match the built-in reference voltage of ICl (15 volts). When the voltage at pin 3 falls below 15 volts, pin 4 supplies a constant....
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Phase-locked loop is very common in telecommunication, control, and other electronic application. PLL can be used to demodulate FM signal, produce a stable...
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This is a Low Cost Universal Battery Charger Circuit. This circuit is used to charge NiCD-NiMH batteries and ideal for car use. This circuit transforms a mains...
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We will use them to show current room temperature using a LM35 temperature sensor. Please note that this schematic is slightly different from our previous schematic on multiplexed seven segment display. The display select i/o pins were RA0, RA1, RA2, RA3 on....
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using only total of 7 pins from your microcontrollers GPIO. So LCD module will cost only single port out of fours. >> The EN line is called "Enable. " This control line indicates to the LCD that we are sending it data. To send data to the LCD, the EN should....
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The pcb of this circuit must be placed near the antenna, in a small metallic box. This VHF antenna circuit must be powered from a 12 volts DC power supply circuit, you can use a 12 volt battery, because the current consumption of this circuit is very low....
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Many of us who invested in Prologic decoders are now looking at Dolby Digital. New formats like DSS, DVD-Video and High Definition Television incorporate this new technology; but what about the old laserdisc format After all, more than 600 laserdiscs feature....
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A static device that couples two circuits for the purpose of transferring alternating current (AC) from one circuit to another by electromagnetic induction. The current remains at the same frequency, but may change in voltage, phase, or impedance values. A....
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A couple of cheap CMOS ICs are used to digitally generate audio sinewaves across a wide range in this compact battery-powered test instrument. The oscillator features both unbalanced and balanced outputs. I use signal generators of one sort or another all....
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Realistic flap and landing gear actuation.
This circuit slows the speed of a conventional proportional servo.
It regulates the time required for full servo rotation from 1 to 10 seconds without any reduction in the servo`s torque, and every servo....
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This simple VU Meter may be used in variety of projects. Since real electro magnetic type VU Meters are no longer available or too expensive, I decided to make this one using LM3914 and 10 LEDs, which I can use in my other projects...
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This timer was designed mainly to switch off a portable radio after some time: in this way, one can fall asleep on the sand or on a hammock, resting assured that the receiver will switch off automatically after some time, saving battery costs. R1 and C1....
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One application is where you need a Higher Power Zener, Possibly even a 100 watt rating.
Another useful application is as a Shunt Regulator for Solar Cells that are used
to charge "Lead Acid Batteries". Simply Place it in parallel with the Solar Cell....
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The circuit is not frequency sensitive. Its calibration will be accurate over a wide frequency spectrum, such as the entire amateur hf spectrum, if the values of L2, the voltage divider capacitors Cl-2 and C3, and the resistances of Rl-2 are chosen properly.....
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The circuit provides a minimum component intercom. With switch SI in the talk position, the speaker of the master station acts as the microphone with the aid of step-up transformer Tl. A turns ratio of 25 and a device gain of 50 allows a maximum loop gain of....
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As shown in the audio circuit is commonly used in color television sets (TDA2009) Pin 1: 1.2V-- left channel input Pin 2: 0.8V-- left channel feedback Pin 3: 12V-- Squelch 4 fe..
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This circuit provides a visual 9 second delay using a 7 segment digital readout LED. When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high....
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Aforementioned asynchronous RS flip-flop is not synchronized with the system clock signal synchronous RS flip-flop is the addition of the synchronization can be synchronized wi..
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AD587 precision voltage reference 10. OOV generated by 27kfl resistor added compensation diode IN4148 and the thermocouple, and to VI + N terminal of the differential amplifier provides a fixed operating point. Thermocouple output voltage to the differential ..
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As shown in Figure 555 is a simple logic circuit test leads. Test pen 555 as the core, it will take a Schmitt trigger, the logic state of the test for digital circuit. 2,6 555 ..
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This is probably the simplest radio transmitter that you will find anywhere. It has a total of five parts and can be constructed into a very small space. It is great for science fair projects or other science related projects where short range transmission....
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TMS320C6678 DSP is a section of DSP based on KeyStone framework that TI released newly, have 8 kernel, the intersection of operating speed and until the the intersection of product and of various fields performance index increase reachable 10 GHz. while....
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The main part of this circuit is the LM386 amplifier chip. It also uses a transistor input to buffer the input signal and provide extra gain for the LM386. The little unit has helped me out on numerous occasions when trouble shooting any amplifier circuit....
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One of the critical components is a pwm speed controller, so that i can finely adjust my speed rather than just having an "on" mode that runs balls to the wall. That way may be fun for a little while but I value my life. lol PWM - I bought a basic stamp....
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This circuit is used to simulate the police car lights by alternating flashing strobes seen on British police cars. The IC1a forms a square wave oscillator having adjustable frequency with VR1 to give the best effect. This square wave is bu....
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Tengu derives its name from a mythicalJapanese creature known for getting intomischief. Our Tengu, however is more earthly in nature. It responds to voice and sounds and takes on different facial features depending on the intensity of the sound. If no sound....
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A USB powered device with multiple IC`s. From what I`ve read it`s standard practice to use a combination of multiple range capacitors for decoupling each individual IC, with the smallest being as close as possible and larger capacitors not too far away.....
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We know that on the market there are plenty of devices that replace normal wall switches and let you adjust the luminosity of a bulb. But if you want to make an "intelligent" home or a more complicated device to adjust the power of a light bulb....
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First of all, the circuit is ok, but it`s rather unstable. It varies with temperature, and, for eg, I turned it on and I tune it. Them I switch it..
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This is a simple high voltage inverter circuit. It is uses NPN transistor type 2N3055. This circuit used to invert low voltage to high voltage. Besides that,....
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In this proximity detector an NE567 tone decoder provides a signal of about 100 kHz that is fed to one sensor. The senso..
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Preamplifiers are used to amplify low level signals such as those from mikes, tape heads before they are fed into power amplifiers. Power amplifiers are generally less sensitive. Frequency response also can be suitably trimmed and modified at preamp stage.....
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An RF power amplifier is a type of electronic amplifier which is utilised to convert a low-power radio-frequency signal into a larger signal of significant power, usually for driving the antenna of a transmitter. It is usually optimized to have high....
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Many circuits can be powered directly from the mains with the aid of a series capacitor (C1). The disadvantage of this approach is that usually only one half cycle of the mains wave-form can be used to produce a DC voltage. An obvious solution is to use a....
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Despite exhaustive searching, every reasonably priced solenoid valve for controlling propane during pushbutton start required 12VDC, beyond the capabilities of a normal pump battery. I know that there are methods to generate HV pulses which will actuate the....
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Potentially, headphone listening can be technically superior since room reflections are eliminated and the intimate contact between transducer and ear mean that only tiny amounts of power are required. The small power requirement means that transducers can....
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With a constant current excitation, the voltage dropped across an inductance in-(in creases with frequency. Thus, an active device whose output increases with frequency can be characterized as an inductance. The circuit yields such a response with the....
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This is a small electronic switch that connects a battery to the equipment for a certain amount of time when a push-button is momentarily pressed. And we have also taken the ambient light level into account; when it is dark you won t be able to read the....
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The circuit is based on the TCM1506 ring detector/driver integrated circuit. It is a monolithic IC specifically designed to replace-the telephone`s mechanical bell. The chip is powered and activated by the telephone-line ring, which can vary from 40 to 150....
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The figure is composed by a NE555 and other withered frequency circuit by changing the self-excited multivibrator NE555 charging current to frequency modulation. The circuit is VT1 and VT2 constitute a current mirror circuit, the charging..
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Having two sets of PWM signal generating circuit within NCP5201 chip, a set of output pins and the ..
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