Led keychain light DIY

thingiverse

LED Keychain You need: - 1 battery CR1220, 3V. - 2 copper or steel wires: wire1 is 1 mm in diameter and 12 mm long. wire2 is between 1mm to 1.8 mm in diameter and 25 mm long. - A 5 mm LED of any color. To prepare it, slide the LED slowly from back to top, then cut the cathode to leave just 5 mm for connection with the tab ahead of the pushbutton. Connect wire2 with the anode and + side of battery. - 1 Pushbutton B3F-4055. Remove two tabs diagonally, then connect the other two tabs to the battery using wire1 and directly to the short tabs of the LED (cathode). You can weld it if needed. - 5 small screws M1.4 (or 1.4 mm), 4 mm long. Before screwing the lid, add a button cap. - A lid, bottom, and button cap (all printed). You can also add text on the bottom like a name or something else.