In SX Microcontrollers, SX/B Compiler and SX-Key Tool, John Bond wrote:

I see plenty of artificial candles on the net with quite long battery life. I'm keen to find out how to do it. My work last night seemed to confirm Kramer's original statement but, if so many others have done it I want to know how. 

My workshop instruments are very primative but it appears that I can get one LED to run at somewhere about 50mA at 2% duty cycl, those stupid laws of phisics seem to kick in after this. The LED (as Kramer said) is still quite dim. Stray capacitance seems to be a problem as well. Oscilloscope probes make it light up a little better.

A rough power budget indicates that the LEDs, even when pulsed, are still the big user of current so I think this is the best place to focus. 

I've got to use the sort of battery you can buy locally. I'll order ICs and other specialized components but I'm not going to complicate my life by ordering some exotic NiHi battery and fancy controlled voltage, controlled current controlled temperature charger.

Hey guys - How do these other people do it with such low power consumption.

John Bond

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