How to make Joule Thief with Multiple LED and maintaining its brightness. Answered
I've seen people running 61 LED or 100 LED on Joule Thief (1 AA Batt) with its full brightness. How did they do it??
I know how to build Joule Thief
-NPN 2N3904, 2N2222A, 2N4401 Transistors
-Resistor what I have now 1K, 560, 100..
-Toroid 12 turns and 20 turns
Can anyone tell me what to do to run at least 10 LEDs with good or full brightness?