Ancient analogue stylus synth. Around christmas they normally have a promotion and sell them for 10 GBP which is reasonable as a donor enclosure, speaker, amp and keyboard/keypad/keystrip ? for an Arduino based synth.
They could sound much better with an Arduino inside.
Long time since I did anything with an Arduino, but I have the urge to finish a synth I started last December.
I have an existing arduino 5 dollar keyboard synth and also a stylophone with the guts removed.
Question is which to base the new project on ?
This is a quick demo of the filter
and this is a quick demo of the five dollar keyboard, the new project will include the filter, arp etc etc from both projects its just a question of whether more people would build a donor keyboard version or a donor stylophone version ?
There is an easy but time consuming work around which is to port the code.
No idea how technical you are but if your upto it you need to find one 8 bit and one 16 bit timer on the Leonardo and then port the existing timer code based on the UNO to use the equivalent Leonardo timers.
A common tunning technique for stock brushed motors in RC Racing is to running them on low power for five minutes submerged in a glass of water. Look up 'water dipping motors' - essentially the water acts like an abrasive to bed the carbon brushes to the commutator and generate a little more power, it may also have a similar effect on the brass bushings that act as bearings in low cost stock motors.
You could actually generate a servo signal and read it back on the same Arduino without even using a wire, just generate the signal using the standard servo library on the same pin that you want to use to read the signal - probably pin 2, I sometimes do this sort of thing for loop back tests.