Published:2011/4/8 3:02:00 Author:Ecco | Keyword: Zero-symmetric , bi-directional , pulse generator
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Published:2011/4/8 4:46:00 Author:Ecco | Keyword: Gate pulse generator , 555
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Published:2011/4/8 0:59:00 Author:Nicole | Keyword: optical receiving
Q1, Q2 form two-stage FET amplifier, it is used in Si solar cells output singal after scale up chopper or optical modulation. About 1000Hz modulation 5lm/ft2(lft=30.48cm)light beam, when R is altered to the maximum gain, the circuit will produce 1V effective value voltage in output terminal.
This circuit can be used to optical communication and alarm system. (View)
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Published:2011/4/8 2:59:00 Author:Ecco | Keyword: Wideband , VCO
The VCO is shown as the chart. The voltage-controlled signal Vi provides a DC voltage with the changing of frequency and phase to the varactor VDl ~ VD3 and from the low-pass filter Rl ~ R3. The voltage is decided by the VCO (voltage controlled oscillator) output frequency of the inductor L, capacitor C3, C4 and varactor diode VDl ~ VD3 and IC (CD4007). (View)
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Published:2011/4/8 2:18:00 Author:Ecco | Keyword: principle diagram, radio-controlled car, emitter
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Published:2011/4/8 2:22:00 Author:Ecco | Keyword: fm , emitter
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Published:2011/4/8 2:52:00 Author:Ecco | Keyword: Wideband , VCO
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Published:2011/4/8 2:50:00 Author:Ecco | Keyword: voltage-controlled oscillator, controlled wide range
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Published:2011/4/8 2:47:00 Author:Ecco | Keyword: voltage-controlled oscillator , circuit logarithmic characteristic , 555
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Published:2011/4/8 2:46:00 Author:Ecco | Keyword: Exponential, voltage-controlled oscillator, 555
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Published:2011/4/8 1:57:00 Author:Rebekka | Keyword: Infrared volume remote control
Dual-channel infrared transmitter:
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Published:2011/4/8 1:54:00 Author:Rebekka | Keyword: Infrared remote control color lamp
Figure (a) is six-way infrared remote control transmitter.
Figure (B) is infrared receiver demodulation, channel decoding circuit, lighting drive circuit.
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Published:2011/4/8 2:53:00 Author:Rebekka | Keyword: pin permutation
CD4514 is a four-sixteen line decoder.CD4013 is a bistable circuits.
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Published:2011/4/8 1:51:00 Author:Rebekka | Keyword: Infrared detection language alarm
Infrared transmitter circuit is shown as below:
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Published:2011/4/8 1:49:00 Author:Rebekka | Keyword: Infrared remote control, multiway switch controllor
The circuit is composed of infrared receiver demodulation circuit and channel decoding circuit. μPC1373 is integrated infrared signal demodulation circuit. (View)
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Published:2011/4/8 1:44:00 Author:Rebekka | Keyword: multi-relay control switch , Infrared remote control
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Published:2011/4/8 1:42:00 Author:Rebekka | Keyword: Infrared remote control voltage
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Published:2011/4/8 1:41:00 Author:Rebekka | Keyword: IR remote control dimmer
Infrared remote control transmitter diagram:
Infrared remote control receiver power amplification and dimming control circuit.
IC1 in IR emitter uses NE555, LM555 etc., IC2 can use μA741 or LM324. IC3 can use LS7232, can also be uses CS7232, SM7232, etc.
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Published:2011/4/8 1:36:00 Author:Rebekka | Keyword: Infrared remote control fan, power supply outlet
The circuit consists of infrared receiver demodulation circuit, speed control circuit, SCR phase trigger circuit and natural air control circuit. (View)
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Published:2011/4/8 2:05:00 Author:Rebekka | Keyword: Frequency modulation , radio reception main frame
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