Where can I buy a cheep four or eight channel bandpass filter? Answered
i want to build device that will contain LEDs. Each LED will light up to a different frequency. I believe this is the part that i need for this, is it not? if so does anyone know where to get them?
Discussions
10 years ago
I have one, but I'm not selling. It is more fun to make your own, and it isn't too hard.
10 years ago
ebay. gut an old hifi equalizer for it's circuitry