> -----Original Message-----
> From: Olin Lathrop [mailto:olin_piclist@EMBEDINC.COM]=20
> Sent: Thursday, July 10, 2003 11:25 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: Puzzling non-reset behavior
>=20
>=20
> > No, the anode of the LED is connected to the PIC.  The cathode is=20
> > connected to +3.
>=20
> That's a strange way to drive an LED.  LEDs should be driven=20
> with a known current.  The actual voltage should be allowed=20
> to vary, and is usually around 2V for normal LEDs (not blue=20
> or white), but depends on batch, temperature, etc.  Your=20
> method connects a fixed 2V to the LED, which is a bad idea.
>=20

Whoops.  I forgot to mention the current limiting resistor:

+3V --  LED ->  --  40 ohm -- PIC

Alex

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