NE555P
D3
OPA548
C1
Capacitance
10uF
C2
Capacitance
0.1uF
MCP4725
R5
Resistance
1kΩ
R3
Resistance
10kΩ
Piezeoelectric disk
R7
Resistance
10kΩ
IRF540
R6
Resistance
5.6kΩ