The speed regulation switch circuit of 555 infrared controlled fans

Published:2011/5/29 21:55:00 Author:Borg | Keyword: speed regulation switch, infrared controlled fans | From:SeekIC

See as Figure 12-24, the speed regulation switch consists of infrared generator, receiver and decoder, etc. It is encoded by infrared pulse, in the distance of 5~5m, the encoder and decoder can do their job reliably, the switch can fulfill the control and switch of five kinds of wind speed(continuous wind), 3-level gusts and breezes. In Figure (a), there is a infrared generator. IC1,D1,R2,R1 and C2 consist a low-frequency multi-resonate oscillator, whose oscillating period is T=t(charging)+t(discharging), of which t(charging)=0.693R2C2, the parameter in the figure is 400μs; t(discharging)=0.693R1C1, the parameter in the figure is 15ms.



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