Make your own opto-isolator?

I am wondering if it is possible to make your own opto-isolator from an led taped to a photo-resistor with electrical tape. Is this possible?

Picture of Make your own opto-isolator?
gmoon3 years ago
It's not just possible, it's very common. I used to make my own compressors (for guitar) back in the 80's with an opamp and a home-rolled LDR.

Weber has a webpage describing how to do it (they sell kits for them).
josh1324 (author)  gmoon3 years ago
cool, could you send ma a schematic for the compressor?
gmoon3 years ago
Look on your Orangeboard, I can't answer your question directly--replies won't work on a "best answer!"
rickharris3 years ago
Very easy put an LED and a photo diode or transistor in a bit of black tubing. How you choose your LED and receiver effects how the system works for your application.

Get More Out of Instructables

Already have an Account?


PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!