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From: Spehro Pefhany
Subject: Re: blinking LED
References: <email@example.com> <firstname.lastname@example.org>
X-Newsreader: Forte Agent 1.92/32.572
Date: Tue, 12 Nov 2002 23:16:39 GMT
NNTP-Posting-Date: Tue, 12 Nov 2002 18:16:39 EST
On Tue, 12 Nov 2002 23:01:47 GMT, the renowned email@example.com (Wouter
van Ooijen (www.voti.nl)) wrote:
>>There are some microcontrollers that could be programmed to do it with
>>essentially no external parts (a capacitor and a resistor).
>For PICs with build-in oscillator you can make that a single resistor
>(the one to set the LED current).
You don't want a supply bypass capacitor? That's the one I was
> Maybe there are even
>microcontrollers that also have current-limited outputs so you can
>even eliminate that resistor. But of course 555 is the answer to 50%
>of all beginners questions. (42 is the answer to the other 50%.)
They are all current limited to some degree. A PIC 12C508 on a
3V supply might be okay driving an LED directly (if you feel lucky).
>PICmicro chips, programmers, consulting
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