Anson Chuang writes: > > I recently opened a dead mouse and it has the exact parts I want, but > obviously I can't use it. > > If there is such a thing as an simple optical rotary encoder that can be > mounted on a front panel of an Amplifier project. Tell me where to get it... > I had the same problem a few weeks ago. I found a few sources for such parts, but they all were too expensive for my application. I couldn't get any optical encoders below $40. If cost is not an issue to you, you can get optical encoders by HP or Bourns, e.g. Look up UK suppliers at their homepage, I can't help you there since I live in germany. (If memory serves me well, I found some HP parts in the Farnell catalogue, which you should have in the UK, too) For my project I finally bought mechanical encoders, since I didn't need the higher resolution of the optical parts. I got Bourns mechanical encoders with 32 steps per rotation. These have mecanical clicks, which is not ideal for my application, but I got them for 7DM ($5) at Farnell's so what the heck... I hope that helps you... PS: If you find cheap optical encoders, pleas mail me, I am still interested! Bye Aki