Re: 300 mA from a microcontroller pin

Arlet Ottens schrieb:
However, using discrete components is probably the easiest solution
(assuming there's space on the board).
If you don't mind a bit of idle current,
here's a simple way that worked for me
(YMMV, of course), using 3 resistors,
2 NPN and 2 PNP transistors:

| |
|/ |
/-----K |
| |\ |/
--- +----K
10k| | | |\
| | | |
--- | |
| --- |
input -----+ 220| | +---- output
| | | |
--- --- |
10k| | | |
| | | |/
--- +----K
| |/ |\
\-----K |
|\ |
| |

HTH.
.

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