Alt-BEAM Archive

Message #10001



To: beam@sgiblab.sgi.com
From: "Thomas Pilgaard" ascii@hum.auc.dk
Date: Thu, 10 Feb 2000 12:36:26 +0100
Subject: [alt-beam] Re: bicore photovores



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Hi,

I've had a brief look at the Bicore Photovore you are talking about but
thought it'd be a bit overkill for my second robot. I found the BEAM-ant
cirquit which is a little less complex. I'm on freeforming it underneath a
3733 solarcell at the moment. The BEAM-ant runs both motors simultaneously,
and has tactiles for reversing one or both motors at a time. Apart from that
it doesn't use motordrivers. I haven't had a chance to breadboard the Bicore
Photovore, but there's no doubt that it has to be made at some point.

For a great schematic and component breakdown etc. etc. you might want to
have a look at

http://www.geocities.com/ResearchTriangle/Node/3904/pictures/ucoba.html

> [snip] I've had little luck finding
> the transistors that I actually need for cheap...

Depending on your whereabouts in the world you can substitute both the
2N3904 and the 2N3906 transistors with comon pnp/npn transistors. I've
succesfully replaced them with BC547/BC327's

Cheers,

Thomas



Attachment: UcobaOverview.html.url

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