Re: Low-voltage diac?
From: Watson A.Name - \ (NOSPAM_at_dslextreme.com)
Date: 12/31/04
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Date: Thu, 30 Dec 2004 20:07:20 -0800
"Gerard Bok" <bok118@zonnet.nl> wrote in message
news:41d4756b.31594749@News.Individual.NET...
> On Thu, 30 Dec 2004 17:06:20 +0100, Reinhard Zwirner
> <reinhard_zwirner@web.de> wrote:
>
> >Neil Preston schrieb:
> >>
> >> Is there available a DIAC with breakover voltage ratings in the
5-15V range?
> >> Or an equivalent device?
> >>
> >> All I've seen so far are in the 50-60v range.
> >>
> >Maybe 2 zeners connected "back-to-back" could work;
"breakover"-voltage
> >would be [Uz + 0.7] V.
>
> The original message read "... and I need the negative resistance
> characteristics ..." :-)
>
> Your solution will mimic a low voltage diac but won't provide the
> negative resistance characteristics.
It won't?? Try this.
http://www.freeinfosociety.com/electronics/schematics/zeneroscillator.ht
ml
Or scroll down to the third one here
http://www.geocities.com/CapeCanaveral/Lab/5185/circuit.html
Now I've tried it, and was unsuccsssful, but I've read that other people
have been able to get it to work. I've also hear that it helps to heat
the zener up with a soldering iron to roast it and make it change its
characteristics.
> --
> Kind regards,
> Gerard Bok
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