Alt-BEAM Archive
Message #02690
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2691 Tue, 27 Apr 1999 13:46:08 -0600 [alt-beam] Re: Bicore head targeting? "Beam List (E-mail)" Dave Hrynkiw At 01:00 PM 4/27/99 , Dennison wrote:
>
> My first Idea was to connect both outputs in some fashion to the +v or gnd
> side of a sizable cap. The idea goes that, while one output charges the cap,
> the other output discarges. When the pulse durations are equal, then in
> theory the average net change in voltage across the cap should be zero.
Actually, average would be 1/2 way between Gnd and Vcc. I'd probably start by
pumping the signal thru a diode into a RC network (so the signal levels slowly
decay), and use a logic gate to compare them. Well, why stop a logic gate? An
opamp would be ideal to detect less-than-equal-but-opposite input signals.
-Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com
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