Infrared Switch circuit

Published:2012/9/28 20:50:00 Author:muriel | Keyword: Infrared， Switch | From:SeekIC

Here is a Simple Infrared controlled Switch. It can be operated using the TV remote handset.The Load can be any AC operated device which can be connected to the relay. The load turns on for three minutes then goes off. It can be used to switch on the lamp in the TV roomThe circuit uses the popular IR sensor module TSOP 1738 and the precision Monostable / Astable IC CD4538. TSOP 1738 IR sensor accepts 38 KHz infrared pulses from the remote. Its output is high at power on and gives 5 volts. When it senses pulsed IR rays, its output becomes low. IR Switch Circuit diagram CD4538 is the Precision Monostable /Astable Multivibrator IC that is free from false triggering. It is more reliable than the popular timer IC 555. Here the IC1 is wired as a short duration monostable timer using R3 and C1 as timing components. With the given values, output of IC1 remains low for three minutes. By changing the value of C1 or R3 various time intervals can be obtained. Unlike 555 IC in the monostable mode, here in CD4530, output of IC becomes high at power on and becomes low when the trigger pin5 gets a low-to-high transition pulse.



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