Alt-BEAM Archive
Message #00757
To: beam beam@corp.sgi.com
From: "Ben Hitchcock" beh01@uow.edu.au
Date: Mon, 22 Feb 1999 17:22:13 +0000
Subject: [alt-beam] Re: It works, but I don't know how... new diagram
It's nice to see one of my circuits cropping up where I wasn't expecting it!
>
>Looks like you were missing a pull-up resistor on 245 pin 19 so the
Yep, I agree.
>
>Anyway here are some questions and suggestions for improvements for you.
>
>What's the narrow pulse generator for?
It's because any circuit that latches on above a certain voltage consumes
heaps of current as it approaches the switch-on voltage. I usually play
around with tiny solar cells, and without the pulse generator the circuit
quite often won't switch on. With the pulse generator the circuit onyl
checks the voltage a tiny fracction of the time. The rest of the time is
spent doing nothing.
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