Learning to type.... (was Re: Programming 101 web page)

[Roger Heflin]

On Tue, 13 Oct 1998, Bruce Plecan wrote:

> 
> -----Original Message-----
> From: Jason Weir <Jweir at worldnet.att.net>
> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> Date: Tuesday, October 13, 1998 11:59 AM
> Subject: Learning to type.... (was Re: Programming 101 web page)
> 
> 
> >Bruce can you prove/dis-prove any of this on the bench? 
> 
> Not enough resolution on what I have for the 747, dia reads it 
> out on the others.  I still need a .5x to 15.5x msec pulse width
> meter for reading pulses really close if anyone has any ideas.
> Bruce 
> 

I sound car will sample 44khz, which should put it easily able
to accurately measure ms range pulses accurately.  Put some OPAMPS to
buffer the inputs and maybe scale things reasonably, and I think
there is some software to make the sound card act as a simple low
frequency oscope, if not, contact me, and it should not be that
difficult to write a simple piece of software to do that sort of
thing.  I have writtem some simple sound card stuff, just not
recently but it was fairly straightforward.

With 44khz assumeing about 10khz bandwidth that should get things
easily down to .1 ms, if you have 20khz bandwidth that should
put things down around .05 or so.  Probably .1ms should be easily
workable, but of course I have not yet tried this sort of thing.

				Roger