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Subject: Re: Unorthodox use of eproms
Date: Thu, 14 Nov 2002 01:41:29 -0800
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References: <firstname.lastname@example.org> <3DD2ACCA.4F33D9E6@mmm.com.DELETETHIS> <email@example.com>
Allan Herriman wrote:
> On Wed, 13 Nov 2002 13:49:30 -0600, firstname.lastname@example.org (Roy
> McCammon) wrote:
> >Gibbo wrote:
> >> I'm sure we've all used eproms for things such as decoders and mapping.
> >> Sometimes it can save a lot of board space.
> >> I recently tried to use one as an oscillator. Just like you'd use inverters or
> >> nand gates etc.To my surprise it worked just fine.
> >> Anyone have any experience of doing this on a larger scale. Using the eprom as
> >> the oscillator and other logic gates etc ? What was the outcome. I might be
> >> doing some experimenting. It's not a new idea I guess, but it's new to me.
> >> Gibbo
> >By connecting only two pins you can use it as an analog
> >logarithmic current to voltage convertor.
> Also useful as a temperature sensor. Add a MAX1617 (etc.) and the
> temperature can be read over an SMB/IIC bus.
I once built a CW Id'er for my repeater using a 2732 and a dual 555. Put all the
machine stuff, cw characters , 10 minute timer, and control stuff in the eprom.
Trigger it and it puts out CW tones every 10 minutes until 10minutes after you unkey
But this was before the days you could buy a PIC for a buck.
Bunch of stuff For Sale and Wanted at the link below.
Tek 2465, TFT projector, ham radio, 30pS pulser
Tektronix Concept Books...
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