IRF740 400V/10A N-Channel MOSFET (pack of 2)

PC817 Optocoupler (DIP4)

ESP32s Micro-controller

The BC547 transistor is a general-purpose transistor in a small plastic packages. It is used in general-purpose switching and...

3386P-1-103 1/2W PC Pins Through Hole Trimmer Potentiometer with easy turn knob (pack of 2). 

X9C104 Digital Potentiometer Module for Arduino - 100Kilo Ohm

General DIY Purpose springs

25 Turns

20 turn Potentiometer 

The BC557 transistor is a general-purpose transistor in a small plastic packages. It is used in general-purpose switching and...