Color Sound™ SupaSustain™

This project is based on the schematic drawn by Tobias Karlsson. Notice that it uses 18 volts DC power, so you’ll need two batteries for this one.

This description of the LED/LDR is also from Tobias:

I believe the LDR looked like this from the top (of course, I couldn’t actually see it but I’m pretty sure it’s the same):

The LDR and LED were mounted together like this in a shrink tube:

For those of you that aren’t familiar with this, put the LDR and LED together in the shrink tube, as shown in the picture, then heat the tube carefully with a soldering iron, then solder the legs from the LDR and LED to the board.