Quantity   Component name
1 × Arduino Uno
1 × 741 OPAMP
1 × 3V battery
1 × 1n4007 diode
1 × Resistor 100 ohm
1 × Single Turn Potentiometer- 10k ohms
1 × Pushbutton switch 12mm
1 × Inductor 1 mH
1 × Capacitor 100 µF