Tools
• Soldering Iron
• Glue Gun
• Wire Stripper and Cutter
• Electrical Tape
Materials
• an old CPU fan
• toroidal inductor
• 2N2222 or 2N3904 or BC547 transistor
• 5v step-up module, (boought on eBay)
• germanioum diodes (5 pieces)
• a small perfboard
• an old phone battery or a 18650 cell
• and a small switch
• bike support element
