AVR-Chat

Actually, using findchips.com, I noticed the MM74C923 and MM74C923
aren't cheap either at $6.82 US in small quantities.

 

Barry

 

 

-----Original Message-----
From: upand_at_them [mailto:upand_at_them@yahoo.com] 
Sent: Tuesday, March 09, 2004 9:34 PM
Subject: [AVR-Chat] Re: Speed Trap

 

Even a slow processor should be fast enough.  Let's look at the 
math...

An object going 100 MPH will travel 1 inch in 0.568 ms.  Assuming a 
slow 1 MIPS processor, you'd get 568 instructions (counts) in that 
time.

In fact, that same processor could track something up to 56,800 miles 
per hour across that 1".

Mike


--- In AVR-Chat@yahoogroups.com, "LightYearCS" <lightyearcs@z...> 
wrote:
> You would most likely need a high speed timer to do this.  The
> microprocessor can read the results but I'm not sure if the built in
> timers would be fast enough to record the events.  You would have to
> define the parameters regarding accuracy.
> 
>  
> 
> What are your acceptable tolerances?
> 
>  
> 
> Barry







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