Tag Archives: Optoelectronics

General Infrared Remote Controlled Relay

Posted on January 24, 2012 by Rend

This relay circuit is controlled by almost any type of infrared remote controller. This circuit works on assumption that almost all remote controller use high frequency modulated infrared light. By filtering out un-modulated or low frequency modulated signal, this circuit … Continue reading →

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Solid-State (555 IC) Stroboscope

Posted on November 13, 2011 by Rend

Stroboscope is used to measure the speed of rotation, using the effect of strobed light, where a moving object will be perceived as stationary object if the light is strobed fast enough relative to the movement speed. When applied to … Continue reading →

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Solid State Relay (SSR) with Optocoupler and Triac

Posted on May 7, 2011 by Rust

This solid state relay (SSR)  equivalent circuit is made of optocoupler and a triac. This SSR circuit is also designed with  LED protection from overvoltage and reverse polarity. The diode 1N4002 is the reverse polarity protector, as it will short … Continue reading →

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