Quantity   Component name
1 × Teensy 4.1
1 × Bell Amazon Bike bell
1 × PAM8203A audio amp
1 × Mini Push Pull solenoid 2776 https://www.adafruit.com/product/2776
1 × TIP120 Discrete Semiconductors / Power Transistors and MOSFETs
2 × Cu Heatsink Pre 1982 U.S. Penny.