Byron Jeff wrote:
>> How much truth is there in saying "The battery isn't powerful
>> enough"?
>> Is it possible to take that 1.5 volts, step it up to 5 volts, and
>> make
>> it put a steady 25 mA through the resistor?
>
> Yes. But at a cost of course. You're using the energy in the battery
> at a rate 3.3 times faster than if you pulled it out at 1.5V.

Not at all.  No, the current will be that much higher but the energy drain
will be the same except for the loss in the switching power supply.


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