Quantity   Component name
4 × 1N4148 (Signal Diode) Discrete Semiconductors / Diodes and Rectifiers
2 × 2N3904 (BJT NPN Transistor) Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs
1 × 2N7000 (N-Channel MOSFET) Discrete Semiconductors / Diode-Transistor Modules
1 × 1N4733 (a 5.1 V Zener) Discrete Semiconductors / Diodes and Rectifiers
1 × 1N4738 (a 8.2 V Zener) Discrete Semiconductors / Diodes and Rectifiers
1 × DB9 (Female serial connector) Electronic Components / Misc. Electronic Components
1 × 100 uF Electrolytic (@ 25 V) Capacitor
1 × 10 uF Electrolytic (@ 25 V)
1 × 1.8 K Resistor (@ 1/4 Watt) Resistor
1 × 10 K Resistor (@ 1/4 Watt)