- echo mic toy
- little amp & speaker (I got mine from a 1-watt Marshall amp I had laying around
) ($35 for the Marshall one I believe)
(you could of course use something more DIY like a little Kemo amp
for example. Make sure your speaker fits the specifications of the amp)
(You might want to get an amplifier for after the piezo mic as well. I don't have it- I just use the instrument inputs on my sound card and it works fine. But in situations where you don't have gain, it might be useful.)
- In the case of the Marshall MS-2, an extra 9v battery connector ($0.5)
- jack socket (you might need two if you're working with a more DIY amp.) ($0.5)
- a box in which it will all fit. So speaker, amp, spring, etc. will have to co-exist in this space. My box was around 18x13x7 cm.
(make sure the box can close with everything in it. Mine can't fully. It's no biggie tho. ($0)
- 9v battery to power amp
- piezo element ($1)
- 2 small paperclips/metal hooks/thingies to glue to speaker/piezo so you can attach the spring.
- Soldering iron!
- Glue gun!