Grace created her own circuit board where the LED’s are symmetrical and all of the connections between the wires are now integrated into the circuit board. It can be used with 3 or 4 AA NiMH circuit or with a single 18650 Lithium battery. It is our basic and most versatile circuit. There is no battery protection.
This board uses:
12 x 5mm through hole LEDs; 12 x 22 ohm resistors; 1 diode; a charging port; a switch and a battery pack.
A complete materials list and links is available in the manual. (In the future, click here to take you to the e-store)
Our friends at Engineering Brightness Colorado made a circuit board that had a diode and an asymmetrical pattern of resistors and LED’s. All of the connections to the switches and batteries were done off the circuit board, with some three way wire connections.