Circuit Diagram

VEHICLE_AUDIO_AMPLIFIER_INVERTER

Published:2009/6/19 4:53:00 Author:May

An audio amplifier can drive a step-up transformer to obtain 120 Vac.   (View)

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SIMPLE_INVERTER

Published:2009/6/19 4:52:00 Author:May

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ELECTRONICALLY_CONTROLLED_VARIABLE_GAIN_VIDEO_LOOP_THROUGH_AMPLIFIER__

Published:2009/6/19 4:51:00 Author:May

An LT1228 transconductance amplifier iS used in this application The gain is adjustable from-12to+8dB.   (View)

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VIDEO_FADER

Published:2009/6/19 4:50:00 Author:May

Using two LT1228 transconductance amplifiers in front of a current feedback amplifier forms a video fader. The ratio of the set currents into pin 5 determines the ratio of the inputs at the output.   (View)

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Infrared remote control dimmer, speed controller diagram 1

Published:2011/6/26 20:36:00 Author:Nora | Keyword: Infrared, dimmer, controller

AC 220V voltage filtered by R2-limiting step, VDl rectifier, VS regulator and Cl, C2. It provide DC voltage about 5V for ICl-IC3 (Vcc).In pressing the remote control button, the remote control infrared remote control pulse(the time is less than 0.45 when press the remote control button , the remote control application output pulses 1-3; if the remote control button press time over .45 , the output of the remote control more than 3 Burst). 1C1 will receive the infrared pulse train amplification, demodulation, and plastic surgery and other treatment, output a low pulse, the VD2 turn, C3 quickly discharges. When the voltage across C3 is lower than Vcc / 3 时, IC2's output of 3 feet high, so that V conduction. When through a pulse train, VD2 end, +5 V voltage charging of C3 by the RP, the IC2 pin 2, 6-pin voltage rise, when the voltage is increased to 2Vcc / 3 时, lC2 flip-circuit, 3-pin change low, V cut-off. If the new moon in the C3 charge between ICl and output a low pulse, C3 will discharge again, then keep the output of IC2 3 feet high.   (View)

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1_kW_10_kHz_SINE_WAVE_INVERTER

Published:2009/6/19 4:49:00 Author:May

SCRs can produce considerable power at frequencies up to 30 kHz or more. This circuit can supply 1 kW at 10 kHz. The load is shown as an equivalent load, and practically this will be the primary of the transformer for isolation purposes. The power supply can be a 120-V bridge rectifier and filter combination.   (View)

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POSITIVE_TO_NEGATIVE_dc_dc_INVERTER

Published:2009/6/19 4:48:00 Author:May

If a source of negative 5 Vdc is needed and only a positive supply is available, this circuit can be used.   (View)

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SCR_INVERTER_AND_TRIGGER_CIRCUIT

Published:2009/6/19 4:47:00 Author:May

In this circuit, L1 and C5 are used as commutating elements. L1 resonates quency corresponding to the half period of the waveform.   (View)

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Thermostat, governor diagram 2

Published:2011/6/26 21:02:00 Author:Nora | Keyword: Thermostat, governor , diagram

When the power selector adjust the switch S, it can change the capacitor charge and discharge rate of Cl, thus change the thyristor conduction angle. Cl through V to the voltage across the trigger and make it turn-VT, by changing the conduction angle of VT to change the electric heater EH (load) both ends of the AC voltage level. VLl and VL2 for the working status indicator LEDs. Placed in the S l stalls, VL2 light; the S placed in the 4 stalls, VLl light.   (View)

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DIFFERENTIAL_VIDEO_LOOP_THROUGH_AMPLIFIER

Published:2009/6/19 4:47:00 Author:May

An LT1194 is used as a differential amplifier for video applications, where low cable loading is needed.   (View)

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TWO_INPUT_VIDEO_MULTIPLEX_CABLE_DRIVER

Published:2009/6/19 4:45:00 Author:May

CMOS logic levels select one of two video in-puts with this circuit. The op amps are Linear Technology LT1190s   (View)

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TCL 8988 mobile phone maintenance circuit diagram

Published:2011/5/6 1:49:00 Author:Jessie | Keyword: mobile phone maintenance

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MULTIPLE_INPUT_VIDEO_MULTIPLEX_CABLE_DRIVER

Published:2009/6/19 4:44:00 Author:May

Using a Linear Technology LT1227, the mul-tiplex video amp uses logic levels to tum on and off selected inputs.   (View)

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INTERFACING_RESISTIVE_TRANSDUCERS

Published:2009/6/19 4:44:00 Author:May

All types of resistive-element transducers, such as servo-pots, level indicators, thermistors, photosensors, strain gages, and so on, can be directly connected to the AD537. The scale-correction factor, K, is a function of resistance, varying from 0.65 to 0.98 for values from 3 to 100 kΩ.   (View)

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TIMER_ac_LINE_INTERFACE

Published:2009/6/19 4:43:00 Author:May

This circuit illustrates the use of an optoisolator to enable the control of a triac connected to the ac line and load, while maintaining dc and ac isolation between the ac line and the timer circuit. A 555 or other timer circuit can be used.   (View)

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KEY_ILLUMINATOR

Published:2009/6/19 4:42:00 Author:May

Used as a 10-second momentary illuminator, this circuit can be useful in other applications as well. Pressing S1 charges C1, which holds Q1 on and holds the LED lit for about 10 seconds.   (View)

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ac_INTEGRATOR

Published:2009/6/19 4:41:00 Author:May

This op-antp circuit can be used with a wide variety of op amps. The values of Rf and Ri depend on gain, but will be 1 kΩ to 1 MΩ in most cases. Cf depends on the pole frequency needed. U1 is a 741-type op amp, etc.   (View)

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SOIL_HEATER_FOR_PLANTS

Published:2009/6/19 4:41:00 Author:May

A TDA1024 electronic thermostat senses soil temperature via thermistor R6. The circuit uses zero-crossing switching of the heater. The heater is made of elastic-coated steel wire. P1 is used to set the temperature. The heater should have 2 Ω or more resistance and operate from the 9-V transformer. About 40W of heat is available.   (View)

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SIMPLE_INTEGRATOR

Published:2009/6/19 4:40:00 Author:May

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INTEGRATOR_WITH_BIAS_CURRENT_COMPENSATION

Published:2009/6/19 4:39:00 Author:May

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