From: Jonathan Kirwan
Subject: Re: circuit wanted-SQUARE PULSE GENERATOR
References: <1038144646.265208@athprx02> <email@example.com> <3DE24901.firstname.lastname@example.org>
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NNTP-Posting-Date: Tue, 26 Nov 2002 05:15:29 GMT
Organization: AT&T Broadband
Date: Tue, 26 Nov 2002 05:15:29 GMT
On 25 Nov 2002 19:31:43 -0800, Winfield Hill
>> Fred Bloggs wrote:
>>> Hmmm- those turns-counting 10T are a bit on the pricey side.
>> The Jesper et al DDS solution doesn't need a PC to operate, if a
>> simple, mechanical quadrature panel mount dial is added, using
>> two input pins to the micro and writing a little more code.
>> (Optical ones are nice, too -- I just picked up a few Agilent
>> ones at $7 ea for hobby use.) With just a little bit more code,
>> a nice digital LED display could be added.
> Indeed, just a little more code... and a little more hardware.
> Sometimes one simply wants to get the job done... :>)
Hehe. I wasn't making a comparison, just noting that the
digital arrangement doesn't need a PC and can be set up as a
stand-alone system. The choice about which is better, depends.
> Here are two turns-counting dials available for $10.99 for both.
The mechanical versions are a lot cheaper than the opticals I
mentioned, something in the $1-$2 range or so, new. No ebay to