The infrared remote control circuit of 555 domestic fans

Published:2011/5/30 21:57:00 Author:Borg | Keyword: remote control, domestic fans | From:SeekIC

See as Figure 12-20, the remote control is use to the Changcheng FS-19-40 infrared remote control floor fan, and the fan is a recently upgraded product of Shuzhou fan factory. The remote control circuit includes an infrared emitter and an infrared decoding receiver controller.The emitting circuit consist 4 CD4011 2-terminal NANDs, VT1 and VT2 drive circuits and infrared LED, etc. Two CD4011 NANDs, R1,R2 and C1 consist the pulse oscillator, and the pulse drives VT1 and VT2 amplifiers after it is rectified, then D1,D2 and D3 emit infrared pulses.



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