He got a couple of opto-isolators and soldered one to the on/off button on the TV’s control board. The Pi didn’t know whether it was switching the TV on or off, it just knew it was switching it.

An optocoupler-isolated power supply is often the safest and most practical way to go when it comes to performance and protection. Here's the basics on today's LED/photodetector isolators and what you ...

Posted in Misc Hacks, Parts Tagged led, logic, logic gate, opto-isolator, optoisolator, optotransistor ...

Featuring 20KV isolation and <50ns propagation delay, the OPI1268S is ideal for metering equipment, transportation systems, hybrid vehicles, medical devices, and industrial control/safety systems.

The use of an optocoupler also acts to break ground loops, and this functionality is valuable in eliminating common-mode noise, especially for systems working at the higher operating voltages. When ...