Re: your mail

From: On-line Snack discussion (snaktalk)
Date: Wed May 29 2002 - 18:24:35 PDT

Unfortunately, this is a little too involved and specific for this
discussion group. However, I will leave it posted in case anyone has a
suggestion for you.

Nina Thayer
Snacktalk Moderator

> hi everybody..
> i'm a science enthusiast and working in embedde s/w
> development..
> i have some problem with some ir related project.. i was searching
> for some solution on the net got hooke with u guys..
> hope i can explain my problem over here..this was a project
> started by someon else and got into my hand later i won't be
> able to change anything in the mechanical design which is already
> freezed long back..
> here it is ..
> there is a rotaing body inside an emclosed cicular column..i have
> to measure the spped of the rotaing body through a small thick
> glass window ..on the rotaitng drum ther are some silver
> reflectors to represent therotations..
> there is an existing cicuit to amplifyt he whole real
> problem is the power consumption by this two stage i
> observethe signal from the ir transcievers i could see signal
> glitching downwords corresponding to the reflectors..that means
> the ir transmitted are more reflecting back from the rotating body
> and the glitch could be because of the reflector ,in some angle
> the ir stream is out of focussed..
> since the rotaing body is very close to the window ,its abt 25mm
> away,ther is alway a chance the ir reflects thought if
> ther is an aborber rather than a reflector icould use some samll
> transistor amplifiers and save power..
> hope you will be able to help me..
> regards
> jemmy
> _________________________________________________________
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