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  • Author Author: tariq.ahmad
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How an Optocoupler Works, and How to Use Them -- DC to Daylight 17

In this episode we look at the optocoupler or optoisolator as it's also known. This little device is great at isolating voltage and noise from one circuit to another, and it can even be used to translate voltage levels. We'll dive into how to go about biasing both the input and output of the optocoupler. Then we'll breadboard a demonstration circuit, including use of a schmitt trigger to give our circuit a snappier response time, and also look at the results on an oscilloscope.

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  • I started using Opt-couplers why back maybe 3 decades ago? (hp stuff) they are really nice for HV isolation LOL to me anything over  5v is HV. I currently use them in some of my displays that take 28, and 12 volts, OUCH, this will turn your microprocessor into a brick, and all the magic will come out very suddenly.

    • Smokeless CPUs: Smokeless CPUs are incompatible with the Linux kernel and it is doubted that any work will ever be performed to change this. They are simply too unreliable in even the most standard system configuration. Those with a CPU missing its Magic Smoke should switch to a new CPU.
    • And BTW toss the board as well - CAH
  • in reply to phoenixcomm

    I don't know why semiconductor manufacturers haven't put more effort into containing magic smoke - this is a problem that continues to plague us all. Until they come up with a robust solution, we'll just have to keep on using optocouplers, and our bill of materials will just have to take the hit.

    Thanks!

    Derek

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