Alt-BEAM Archive

Message #11870



To: beam@sgiblab.sgi.com
From: Darrell Johnson beamtastic@yahoo.com
Date: Wed, 15 Mar 2000 01:12:24 -0800 (PST)
Subject: [alt-beam] Re: power smart head



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here you go: It's slightly modified in that I put pin
numbers in red on the inverters.(to help somebody out
long ago..) Otherwise it's the drawing that Wilf made.
What's the matter? Don't trust *my* schematic? ;)

darrell


--- Bumper314@aol.com wrote:
> I was looking for the very original, with just the
> inverters diagrammed, not
> the chip pinout kinda version
>
> Steve
>

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Attachment: PowerSmartHead.gif

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11871 Wed, 15 Mar 2000 02:28:30 -0800 [alt-beam] Re: IR Sensor Circuit alt-beam@eGroups.com "Daniel Cotter" I have added an IR sensors to a 2 motor solar roller I have. It sends
an IR pulse for 100ms (or less) about 10 times per second. The same
oscillator generating that pulse is used at the reciever to see if a
pulse is returned. IR won't reflect of some surfaces well, especially
in the sun light. There is also a another problem if you choose to use
a reciever module because most of them need +5V fairly constantly, were
as a photo diode is much easier to please. I found that a reciever
module was not needed because I only wanted to recieve the infrared
when the bot got about 30 or 40mm from an object.

Also the IR signal the reciever gets is often distorted and not a
straight pulse, so you must make sure you can use an Resistor-Capacitor
circuit to make sure that any decent pulse for the transmitter will be
enough to set the bot to reverse. I have a circuit for all this
somewhere and once I find it I can send you it you it if you want.

Hope some info here is helpful.
Cya,
Daniel

david simmons wrote:
original article:http://www.egroups.com/group/alt-beam/?start=11812
> Hi all,
>
> Does anyone a simple IR crash sensor circuit, I have IR senders and IR
> detectors that look like LEDs but don't know how to use them. Looking
> for a simple way to backup a solar turtle with out touch sensors. Any
> idea's would be of great assistance.
>
> Thx,
> Dave

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