Remote Controlled Fan Regulator

Remote Controlled Fan Regulator - CIRCUIT IDEAS...

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CIRCUIT IDEAS 88 • JULY 2006 ELECTRONICS FOR YOU W W W . E F Y M A G . C O M U sing this circuit, you can change the speed of the fan from your couch or bed. In- frared receiver module TSOP1738 is used to receive the infrared signal transmitted by remote control. The circuit is powered by regulated 9V. The AC mains is stepped down by transformer X1 to deliver a second- ary output of 12V-0-12V. The trans- former output is rectified by full-wave rectifier comprising diodes D1 and D2, filtered by capacitor C9 and regulated by 7809 regulator to provide 9V regu- lated output. Any button on the remote can be used for controlling the speed of the fan. Pulses from the IR receiver mod- ule are applied as a trigger signal to timer NE555 (IC1) via LED1 and resis- Dr C.H. VITHALANI REMOTE-CONTROLLED FAN REGULATOR S.C. DWIVEDI tor R4. IC1 is wired as a monostable multivibrator to delay the clock given to decade counter-cum-driver IC CD4017 (IC2).
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