Re: Schmitt trigger for feedback SSTCs

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Mr Gregory Peters <s371034-at-student.uq.edu.au> 

Hmmm, thanks for that link. Looks promising.

Cheers,

Greg Peters
Department of Earth Sciences,
University of Queensland, Australia
Phone: 0402 841 677
http://www.geocities-dot-com/gregjpeters



----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
Date: Saturday, May 1, 2004 2:12 pm
Subject: Re: Schmitt trigger for feedback SSTCs

 > Original poster: John Keith <jskeith-at-interaccess-dot-com>
 >
 > Hi Greg, all...
 >
 >    You might want to look at the TMS2815 from TI ( www.ti-dot-com ).
 > 4 to 14V
 > operating voltage, 2A peak output current, dual-NAND configuration
 > in an
 > 8-pin package. Kind of like a 4093 with b-at-!!s. More expensive than
 > a 555,
 > about $2.00US, but quite versatile and made for the purpose of
 > driving FETs.
 >
 > Regards,
 > John Keith
 >
 >
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Thursday, April 29, 2004 9:56 AM
 > Subject: Schmitt trigger for feedback SSTCs
 >
 >
 > > Original poster: Mr Gregory Peters <s371034-at-student.uq.edu.au>
 > >
 > > Hello all,
 > >
 > > Been looking at common, cheap schmitt triggers used for
 > feedback SSTCs,
 > and
 > > have noted that they:
 > >
 > > a) generally only run on 5v
 > >
 > > b) Can only supply a few tens of mA output
 > >
 > >
 > > Anyway I found this circuit at:
 > >
 > > http://www.uoguelph.ca/~antoon/gadgets/555/555.html
 > >
 > > Go to the "example circuits" section, figure 9.
 > >
 > > It is a 555 timer being used as a schmitt trigger to clean up
 > dirty wave
 > > inputs. Seems this would be useful to us SSTCers, as it is
 > cheap, can run
 > > off 12v, and can supply up to 200mA output current.
 > >
 > > Is there any reason why this couldn't be used in a feedback
 > SSTC system?
 > >
 > >
 > > Cheers,
 > >
 > > Greg Peters
 > > Department of Earth Sciences,
 > > University of Queensland, Australia
 > > Phone: 0402 841 677
 > > http://www.geocities-dot-com/gregjpeters
 > >
 > >
 >
 >
 >