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Remote Control Circuit

Index 21

The multi-encoding single chip remote control circuit

Published:2011/6/23 10:15:00 Author:qqtang | Keyword: single chip, remote control

The multi-encoding single chip remote control circuit
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A air-conditioner remote control circuit of CL

Published:2011/6/23 10:17:00 Author:qqtang | Keyword: air-conditioner, remote control

A air-conditioner remote control circuit of CL
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The infrared remote control signal converter circuit

Published:2011/6/23 10:12:00 Author:qqtang | Keyword: infrared, remote control, signal converter

The infrared remote control signal converter circuit
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The machine tool magnetic sucker low-current protection circuit

Published:2011/6/19 2:47:00 Author:Seven | Keyword: machine tool, magnetic sucker, low-current

The machine tool magnetic sucker low-current protection circuit

See as the circuit, the +24V is generated by stepping down the 110V power supply. When the touch spot JK of the magnetic sucker circuit is closed, the sucker is on and working, whose regulated current is 1.4A(the current of strong sucker is higher). At the moment, the sampling resistor which is serially connected in the electric sucker will have a 1.4v voltage drop, the dropped voltage is sampled by the potentiometer RP1 and imposed on the transistor VT1 input circuit, and then compound-magnified by VT1 and VT2. The multiple after being compounded by VT1 and VT2 is high. (View)

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The ultrasonic wave remote control lamp switch working principle and circuit (1)

Published:2011/6/20 22:05:00 Author:Seven | Keyword: ultrasonic wave, remote control, working principle

The ultrasonic wave remote control lamp switch working principle and circuit (1) is shown as above: (View)

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The working principle and circuit of the ultrasonic wave remote control lamp switch

Published:2011/6/20 1:17:00 Author:Seven | Keyword: working principle, ultrasonic wave, remote control lamp

The working principle and circuit of the ultrasonic wave remote control lamp switchis shown in the figure. (View)

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The practical ultrasonic wave remote control emitting circuit

Published:2011/6/20 22:05:00 Author:Seven | Keyword: ultrasonic wave, remote control

The practical ultrasonic wave remote control emitting circuit is shown in the figure. (View)

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The FM modulation circuit of crystal oscillator

Published:2011/6/20 1:33:00 Author:Seven | Keyword: FM modulation, crystal oscillator

In the figure is the FM modulation circuit of crystal oscillator. FM modulation has direct and indirect FM ways, the direct FM method is to directly change the frequency of the oscillating circuit, it's simple, but as it is the LC oscillating circuit, the bias is kind of noticeable, and the stability is weak, i.e the frequency is easy to be affected by the power supply voltage change and the temperature change. By using the crystal oscillating circuit, the frequency stability is high and the bias is only about 1%. In the circuit, X is a 10MHz crystal oscillator and it directly modulates the frequency of the circuit. (View)