Home Made Circuits
The IRF540 Mosfet or any other equivalent you have around, along
with Q2 BC547 forms a current source for the parallel 12 LED
array. Ultra-bright White LED at 20mA each or use a 1W ready LED
Chip. R4/R6 can be selected for the Max LED current.
One Single High Current LED may work well. 12 Matched LEDs also
can be used. In LED Array some are dim, put min. resistor (3.9
ohm) for all 12 for current sharing. The resistor addition will
impar the ability of Candle to work at lower battery voltages.
Also resistor is less green, It wastes power, so use PWM and
Single Die high current LED.
20th Mar 2020
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