or a 555. AND I hope he screams his guts out !! :-))
jk
----- Original Message -----
From: "threeneurons" <[email protected]>
Here's a simple charge pump:
http://snipurl.com/23qbkk
only 4 parts. 2 10uf caps, and 2 1N4148 diodes. Output roughly -4V.
Oh, the input is a 5V squarewave, over 5KHz. It can be generated from
a spare uC output port bit.
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