First I found an excellent tutorial on how to program ATTiny45’s.
They are cheap and with a little luck I might even be able to move my code to an ATtiny13, cheaper 🙂
Then pure greatness struck with the whole 1 line of audio-generating struck. Loads of inspiration there.
I now have a small program that compiles to 930 bytes (room for optimization there is) that plays loads of different sounds.
The volume of the sound is not that loud. But with a pair of easy to drive speakers it will be enough for most environments.
With real prices on everything but the solar panels I’m up to 35 SEK.