finding toys at trash n treasure/op shops often means the battery compartment/holder is dodgy. The terminals are corroded, or fragile and snap.
Just wondering if people have tips of how they solve this. I tried to move terminals from one machine to another, but for some reason it is a poor connection.
I thought I could buy a battery holder, and put that outside/inside the toy. thoughts?
A better option might be to make it run of DC power. If i do this, the toy is 3V [2xAA], but I run everything else at 9V [one DC power supply and a daisy chain].
What is the best [cheapest/easiest/smallest] method to drop the voltage from 9V to 3V for a toy?
3.3v is a standard voltage for some microcontrollers, so there should be plenty of cheap power supplies out there.
One of these for a start http://www.ebay.co.uk/itm/261801229379 (http://www.ebay.co.uk/itm/261801229379)
5 for £3.26 including shipping from china............ how the hell can they do that?