I have used this to power a white LED nicely.

Attached is one of the original messages containing the circuit to which you ref
er,
with the correct ASCII art. (If you are using a fixed point font, of course...)

Dan

On Mon, 8 Nov 1999 00:08:00 PST, Alice Campbell wrote:

>While rummaging the Archives i found the following discussion of
>powering a circuit from a single battery.  However, the ascii diagram
>was munched.  I tried to unscramble it, but i think i have it wrong.
>
>>From this explanation it seems like the circuit should work with a
>>higher
>voltage LED. Has anyone tried to power a blue LED from a single cell?
>
>snip%<-----------------------------------------------------
>>>> On 2/2/98 Pasi T Mustalahti wrote:
>>>>
>>>> -------8<--------
>>>> >
>>>> > ------------------------------------- +U (0.6..1.55 V)
>>>> >               |                   |
>>>> >              R20K              || <
>>>> >               |                || <
>>>> >               ---------------> || <
>>>> >               |              > || <
>>>> >               = 10nF  /------> |--|
>>>> >               | ----| BC337       |
>>>> >               |       \,          |
>>>> >               |        |          |
>>>> > --------------------------------------
>>>> >
>>



Content-Type: application/octet-stream; name="EOLE6O0.MSG"

Attachment converted: wonderland:EOLE6O0.MSG (????/----) (0000F3CD)