Circuit Diagram

The photo-communication receiver circuit

Published:2011/6/17 0:15:00 Author:Seven | Keyword: photo-communication receiver

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The Toyota A340E auto speed regulator each D1 gear oil circuit

Published:2011/6/18 2:23:00 Author:Seven | Keyword: Toyota, speed regulator

The Toyota A340E auto speed regulator each D1 gear oil circuit is shown in the figure.   (View)

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The STK4191 application circuit

Published:2011/6/20 21:56:00 Author:Seven | Keyword: application circuit

The STK4191 application circuit is shown in the figure.   (View)

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The frequency synthesizer composed of CD4069, CD4013 and so on

Published:2011/6/17 6:49:00 Author:Borg | Keyword: frequency synthesizer

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The color diagram of the headphone circuit

Published:2011/6/17 0:30:00 Author:Seven | Keyword: color diagram, headphone circuit

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The adjustable, stable large current power supply

Published:2011/6/15 23:45:00 Author:Borg | Keyword: large current, power supply

The voltage of the stable power supply can be regulated from 3.5V to 25V, whose output current is large, and it is an adjustable voltage steady pipe circuit, so a stable enough output vo
tage can be got.Working principle: after being filtered and rectified, the DC voltage is offered to the basic pole of the adjusting pipe by R1, which makes the pipe conducting. When V1 is conducting, the voltage crosses RP and V2, which makes V2 conducting, and V3 is also conducting subsequently, at this moment, the voltages on the emitters and collecting electrodes of V1, V2 and V3 are no longer changing(the functions are the same with the voltage steady pipe). By adjusting RP, we can get a stable output voltage.   (View)

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The STK4182 application circuit

Published:2011/6/20 21:59:00 Author:Seven | Keyword: application circuit

The STK4182 application circuit is shown in the above figure.   (View)

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The stereo drive circuit

Published:2011/6/17 0:44:00 Author:Seven | Keyword: stereo drive circuit

The preset amplifier has a low impedance and it is designed to drive long cables, which allows people to listen to the music far away without expensive selective cables. It has an impedance of 16Ω at 1KHz, which makes it connects witch the ordinary ring wires, loudspeakers or alarm cables. It needs a pre-amplifier near the distant music source, such as a disc player, and then people go to a wanted distant place to listen to the music. The receiver point No. of the pre-amplifier is sometimes less than one.   (View)

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The precise large current stable power supply composed of LM338

Published:2011/6/15 2:06:00 Author:Borg | Keyword: large current, power supply

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The multiple output stable power supply (7912 and 7805)

Published:2011/6/15 23:03:00 Author:Borg | Keyword: multiple output, stable power supply

In the figure is the multiple output stable power supply. The circuit provides with 4 teams of independent output voltages of +12v, +5v,-5v and -12v by using the 4 second transformer coils, 7812,7805,7905 and 7912. The voltage of each team has its own switch controller and output indicator. The circuit can be used for experiments.   (View)

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The 555 light-off reminder principle circuit

Published:2011/6/17 1:04:00 Author:Seven | Keyword: light-off reminder, principle circuit

When the light is on, the power supply from the direction light relay is imposed on 555 8-pin, which makes the capacitor C3 charges by R1. As the charging is going on, the LEV on 6-pin is rising, when the LEV reaches 2/3VDD (after it is delayed about 1min), the 555 is reversing, 3-pin outputs a low LEV to make BG conducting. Then the LED is driven to glow, the buzzer is ringing, and the photo-sound reminds the driver of turning off the light quickly. The time of lighting, which is corresponding to the delayed time in the circuit, can be changed by adjusting the time constant R1C3.   (View)

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The CIC2851E fridge door closure reminder circuit principle diagram

Published:2011/6/19 0:06:00 Author:Seven | Keyword: fridge door, closure reminder

The CIC2851E fridge door closure reminder circuit principleThe circuit consists of the step-down rectifier stable voltage, the time delay circuit, the music integrated circuit CIC2851E, the loudspeaker and so on, of which the step-down rectifier circuit provide with a 3V DC voltage for the whole circuit.When the fridge door is open, the switch AN is on, capacitor C3 is charged by R3, as the charge is going on, the basic pole LEV of BG1 is rising, in about 20min, the voltage on C3 conducts BG1, and BG2 is blocked, which triggers CIC2851E, the output music signal is magnified by BG3.   (View)

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The constant current stable power supply in parallel connection composed of 5G14D

Published:2011/6/15 0:06:00 Author:Borg | Keyword: stable power supply, parallel connection

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The +24V and 1.9A stable power supply composed of 5G14D

Published:2011/6/15 0:03:00 Author:Borg | Keyword: power supply

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The parallel current expanding power supply of -18v and 2A composed of CW337

Published:2011/6/15 0:01:00 Author:Borg | Keyword: current expanding, power supply

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The car alarm circuit

Published:2011/6/17 1:05:00 Author:Seven | Keyword: alarm circuit

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The bus station series indicator circuit

Published:2011/6/18 23:54:00 Author:Seven | Keyword: bus station, indicator

The circuit consists of the 555 single stable time delay circuit, a counter IC2, a decoding displayer IC3, a delay stereo circuit and so on. The single stable circuit consists of 555, Rt, Ct and so on, it's delayed time is td1=1.1RtCt. The counter can preset a 4-bit binary reversible counter CD4516. IC3 is a 4-bit lock-storage 4-16 line decoder. The stereo circuit consists of the music integrated circuit IC4(KD9300) and the loudspeaker. When the switch AN is pressed, the delaying pulse, which is output by IC1, is added on the counter IC2, and IC2 does the +1(or -1) counting, and the output of Q1~Q4 comes into IC3 for decoding.   (View)

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The large current output linear stabilizer circuit composed of many MOSFET pipes in parallel connection

Published:2011/6/14 21:41:00 Author:Borg | Keyword: large current, linear stabilizer, MOSFET

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The +5V voltage stable power supply composed of LM7805

Published:2011/6/14 21:34:00 Author:Borg | Keyword: stable power supply

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The audio power amplifier circuit of OPA604

Published:2011/6/17 1:18:00 Author:Seven | Keyword: power amplifier

The front stage of the circuit is made of the FET HF op-amp OPA604, the rear stage is made of the high speed buffer BUF634, and a voltage serial passive feedback is used between the two stages of the amplifiers. The magnified multiple of the circuit is determined by two resistors (5kΩ and 250Ω) in the feedback sub-circuit, whose value is l+5kΩ/50Ω≈21. BUF634 is a high speed buffer.   (View)

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