On 10/26/2010 3:01 AM, scott wrote:
>>> I made an example using that Java circuit simulation applet:
>>>
>>> http://tinyurl.com/2cplrbn
>>>
>>
>> another simple charge pump based on a 555 timer.
>>
>> http://tinyurl.com/2a8wf2x
>
> Cool! I know also that you can use a circuit with inductors rather than
> capacitors to make it more efficient, but the downside is the inductors
> need more physical space than the capacitors on the board (only a
> problem if space is very limited).
>
>
>

I have yet to attempt a boost converter using an inductor. I should 
attempt such a thing one of these days. ;) From what I understand, you 
can get some pretty nasty high voltages with such a circuit. Probably 
one of the reasons I haven't messed with it.

There's a regulator circuit geared toward LED use that, iirc used a very 
small capacity that used the same theory to supply enough voltage to 
overcome the high output LED's VF from a very small battery, even when 
the battery is nearly spent and has a voltage drop. Something called a 
joule thief. Essentially a boost converter using a transformer.

-- 
~Mike

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