Quantity   Component name
1 × PIC12F675 Microprocessors, Microcontrollers, DSPs / Microcontrollers (MCUs)
1 × PIC programming HEX file Dowload on this page
1 × Piezo disc Connected to pin 5
1 × 10 K Pull-up of pin 4
1 × 220 K Couples the trim pulses from pin 6 to the peizo
1 × 100 nF Across Supply rails pins 1 & 8