Instructables

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?
gmoon2 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)  gmoon2 years ago
cool, could you send ma a schematic for the compressor?
gmoon2 years ago
Look on your Orangeboard, I can't answer your question directly--replies won't work on a "best answer!"
rickharris2 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.

http://preher-tech.com/Documents/opto-isolators.pdf
Pro

Get More Out of Instructables

Already have an Account?

close

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!