Alt-BEAM Archive
Message #02684
To: Beam List beam@corp.sgi.com
From: Senior kyled@cruzers.com
Date: Monday, April 26, 1999 6:43 PM
Subject: [alt-beam] Photopopper Circuit: 3906 needed?
>Hey there Beamers.
>After finally figuring out how transistors and SEs work, I looked at the
>photopopper circuit and can't figure out what the 3906 is and resistor
>are needed for.
>
>Here is the circuit:
>http://www.beam-online.com/Robots/Circuits/BEAMPP.JPG
>(Ian's sight is famous!)
>
>I could see why they might be needed to latch, but doesn't the 1381 take
>care of that? Or is it just there to help the 1381 turn the 3904 on? The
>3906 doen't turn on untill the 3904 does though, right?
>
>Thank you ;)
>Kyle
>
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