Handmade in electronic piano projectPIC16F690, PIC16F887 or PIC16F886. PIC microcontrollers can be used to connect to the legs of metal coins used as key microcontroller with ADC circuit 36 is used for touch-key hues quite well
C source code of all the resources given to the Electronic Piano project on the site of the circuit logic and circuit realization detailed information about the operation of the software given.
Electronic Piano Circuit finished version
If a site other electronic piano circuit applied in wooden boxes (Proteus ares have PCBs) in PIC16F690 PIC outputs used and reinforced with an integrated stereo amplifier TDA2822