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High speed optocouplers technical parameters are: Rise time t1 ‰¤ 300ns; Circuit eye transfer ratio CTR = 50%; Isolation voltage VSO ‰¥ 15000V; Output transistor reverse breakdown voltage V (BR) CEO ‰¥ 50V. The optical coupler can be widely used for the....
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Here is the circuit diagram of an easy to build long range AM transmitter circuit based on three transistors. With correct tuning and a matching antenna, the transmitter can deliver signals up to a distance of 2 kilometers. The audio signal to be transmitted....
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The LinkSwitch-XT LNK363DN based‚ flyback power supply shown in Figure 1 generates a single isolated DC output voltage from a 90 VAC to 264 VAC input voltage range. The power supply output is 5 V, 550 mA (2. 75 W) constant-voltage/constant-current (CV/CC).....
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Build a preamp that I want to use to take a 1/4" keyboard line level signal and drive a Leslie 147 amplifier with it. I want to build the preamp using a 12AX7 and 12BH7 based on the design of a Hammond Organ preamp. Here is the schematic to the Hammond AO-28....
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J1 And J2 are a matched pair of J310`s (can also use U310`s or a U431 matched pair). R2 is selected to bias the 2 FETs with a small drain current with no RF input. The turns ratio of the input transformer is selected for an approximate 50 ohm impedance match....
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Diagram shows the basic construction of a forward converter. Whereas the energy is temporarily stored with the flyback converter before it is transferred to the secondary side, in the forward converter, energy is transferred directly between the primary and....
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A simple 2 Transformer, 4 Germanium Diode Ring Modulator with a true bypass switching scheme. Includes input for Carrier Wave modulation. Power is only required for the status LED...
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I have a NOS lathe with NO history. Period. I think it was maybe purpose-built. In any case, I mention it because there is really no "tech-support....
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This is the circuit diagram of a simple UPS that can deliver 12V unregulated and 5V regulated DC. The transformer T1 steps down the mains voltage to 12V AC and then the bridge B1 rectifies it. The rectified signal is smoothed by the capacitor C1. When the....
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Every DAC board and also decoder includes power supply part. Only one part which missing is power transformer. It is possible to use for example toroidal transformer with a power switch and fuse holder on a chassis. I offer here one of many variants where is....
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This project really works with water. I don`t know how can I use this but you know that I like those stuff. I started my tesla coil too but I don`t think that this stuff will work. from a conventional transformer in that the voltage and current relationships....
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This is a remote on-off switch circuit. With this circuit, we can take the benefit of using small switch to control larger AC current from high power devices....
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In this picture is everything you will need to make a self running power supply. The input is a 12vdc 7ah lead acid or gel cell battery (not shown). The input goes to a 12vdc to 120vac inverter of about 200 watts more or less, it is not critical as long as....
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Schematic drawn using OrCAD Capture, which is straight out of the datasheet of the flyback controller LT3748. This is a class project and we must build our own transformer. We couldn`t get the bobbin we wanted and so decided to just lay down the transformer....
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Triac regulation suited to regulate the power of mains appliances. It can regulate the brightness of incadescent light bulbs, halogen, dimmable energy savers, the power of heaters and other thermal appliances, engine (motor) regulation, etc. Fits as well to....
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Using this circuit, you can change the speed of the fan from your couch or bed. Infrared receiver module TSOP1738 is used to receive the infrared signal transmitted by remote control. The circuit is powered by regulated 9V. The AC mains is stepped down by....
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The ultrasonic atomizer circuit is composed of the power supply circuit, oscillator circuit and the water level control circuit, and the cirucuit is shown in Figure 3-189. Power supply circuit is composed of the power transformer T, rectifier diodes VDl-VD4,....
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If you want to do the ground loop elimination in audio path, you have to cut the galvanic connection but pass the whole audio range. The simplest and most common way to do the isolation is use audio transformer which is ment for audio use. Transformers for....
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To start with, there is a step-down mains transformer with a secondary winding rated at 24 V/3 A, which is connected across the input points of the circuit at pins 1 & 2. (the quality of the supplies output will be directly proportional to the quality of the....
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The PWM control dimming halogen lamp circuit is as shown. Rated voltage of the halogen lamp is 12V, the nominal power is 20W, the dimmer circuit can adjust the intensity of halogen lamp from zero to maximum. Lighting halogen lamp always transforms the....
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ZXLD1100 is a PFM flyback DC to DC boost converter that work in discontinuos mode. The following circuit diagram show you about setting 4 LED Driver for Handset LCD Backlight using this device. The ZXLD1100 designed for driving 2,3,4 series connected white....
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This inverter can deliver high-voltage ac or dc, with a rectifier and filter, up to several hundred volts. The secondary and primary of T1-a 12. 6 to 440 V power transformer, respectively-are reversed; e. g. , the primary becomes the secondary and the....
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This design resulted from the need for a partial replacement of the well-known 8038 chip, which is no longer in production and there fore hardly obtainable. An existing design for driving an LVDT sensor (Linear Variable Differential Transformer), where the....
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Electronic horn circuit diagram. When power line is switched on, a general/basic tone is produced by transistor T2 and transformer X1, that is frequency-modulated by the wandering voltage generator, which, in turn, is affected by the low-frequency squarewave....
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This simple circuit tests speakers, microphones, transformers and voltage. It`s basically a very low frequency oscillator that produces extremely short fruity` pulses. The type of sound produced is very easy to hear and to determine the precise direction it....
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Tesla built the world`s most powerful radio transmitter. Around the base of a 200-foot mast, he placed an air-core transformer that measured 75 feet in diameter. The primary consisted only of only a few turns of wire; the secondary was 10 feet in diameter....
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To charge lead-acid batteries we can use this circuit that consist of a current-limited power supply and a flyback converter topology. Here is the schematic....
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This circuit will be particularly useful to those hobbyists who use a breadboard` to try out ideas and who also use a simple home-made` DC power supply consisting of a transformer, rectifier, smoothing capacitor and protective fuse, that is, one without over....
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A battery is a low-impedence source of power. It is most efficient and economical when supplying low voltage at high current..
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Repair a Samsung SCR-3000 DVR COMBO for my security system. I`ve replaced 3 capacitors which were obviously blown, and see only one resistor (adjacent to the transformer) that is scorched. Problem is I can`t read the bands and hope someone can tell me the....
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The following schematic diagram is four hour timer circuit. Feature : easy to build, 3 hours 53 minutes total time, 9V supply voltage. Component : 555 timer IC, Resistor, capacitor, switch, transformer, LED, CD4040B, Relay, BC547 transistor, 1N418 diode,....
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High frequencies are here defined as those above 50, 000 cycles per second. For industrial power supply the Golpitts circuit, Fig. 28-1, or the coupled-grid self-excited oscillator circuit, Fig. 28-2, is most commonly used. In either circuit, the alternating....