You are reading a single comment by @Gordon and its replies. Click here to read the full conversation.
  • Good point - it's worth a try. There's no specific reason I chose that LDR other than it being what I had in my desk. However my meter flashes red and it worked for me.

    Looks like you still get ~60% of the response for a red LED though so while maybe not as good it may be fine.

    1 Attachment

    • gl5337-wavelength.png

Avatar for Gordon @Gordon started