I had an idea in my head for a simple and cheap way to tune a string using stuff lying around the workshop.
For this you will need:
- A Box (small, chunky and sturdy is best)
- A wooden stick of some kind (could be a mop handle, dowel, again anything sturdy) All i happened to have was some bamboo from grandmas garden.
- 1 long bolt with 2 nuts to fit it
- 1 piezo transducer (I think in the states you usually buy a buzzer and take it apart, here in the UK we have maplins who sell them naked - http://www.maplin.co.uk/piezo-transducers-3202)
- 1 1/4 inch mono chassis socket (again, maplins comes in useful http://www.maplin.co.uk/1-4-mono-chassis-socket-1252)
- 1 piece of wire (guitar/banjo string would be ideal, if you don't have that you can strip a small length of washing line, they usually have a good width wire inside the plastic core)
- 1 piece of very hard wire, or a nail, bent into a figure of 8. or a washer with a hole or a small L-bracket would suffice. as long as it can fit onto your long bolt. (i'll explain more in step 6)
- 1 small piece of scrap wood to act as a bridge
The first step is to solder the piezo to the 1/4 inch chassis socket.
Red/black to either pin, it makes no difference.
You have now made the easiest contact mic set-up you're likely to find anywhere.