Alt-BEAM Archive

Message #08910



To: beam@sgiblab.sgi.com
From: Blumojo13@aol.com
Date: Fri, 7 Jan 2000 22:43:55 EST
Subject: [alt-beam] Check out 555 Timer


http://www3.ncsu.edu/ECE480/480_555.htm
Here's a site on the 555timer
blumojo13



8911 Fri, 7 Jan 2000 22:49:41 EST [alt-beam] FYI beam@sgiblab.sgi.com Blumojo13@aol.com http://www3.ncsu.edu/ECE480/480_1.htm
I don't know if anyone has posted this site ,but I have found it to be very
useful.
Peace,
blumojo13



8912 Sat, 8 Jan 2000 01:47:58 EST [alt-beam] Re: SIMPLIFIED D1 CIRCUIT beam@sgiblab.sgi.com JVernonM@aol.com In a message dated 1/7/00 3:56:24 PM Eastern Standard Time,
Wilf.Rigter@powertech.bc.ca writes:

> When the SIMD1 triggers at night, it snaps on
> and the output signal can be used to control the 5 remaining 74HC14
> inverters connected in parallel with the outputs used as a "power" switch.
Wilf you are amazing! This SIMD1 works like a charm! I hooked it to a Bicore
LED flasher and it worked beautifully, even using the flat coin like super
caps (the D1 would not work with these caps). You weren't kidding when you
said the circuit "snaps" on. It refuses to come on until almost total
darkness and then SNAP, it switches on in full. It truly solves the problems
with the old D1 wasting most of it's charge in the switching on stage. I'll
definitely be using it from now on. Thanks again for sharing your expertise!
You're one in a million. And psychic as well, I have been fighting the D1 for
two days now on a bot for Lee Golden and could not get it to work with those
flat caps. Then, presto, there the circuit was in my mail box. Amazing!

See ya,
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
ICQ# 55657870



8913 Sat, 08 Jan 2000 18:57:16 +1100 [alt-beam] Re: Pressure Sensors beam@sgiblab.sgi.com Rob What if the foot, with the bend sensor lengthwise in it, was flexible and
held in a concave curve by a light spring (toes up)? When the foot was
pressed on the ground the resistance would drop as it straightened out under
the weight of the robot.
Someone mentioned some resistive paint a few months ago. Would that be a
possibility?
Rob

Jonathan D Rogers wrote:
Couldn't you rig up a bend sensor somehow to detect pressure?
You know, maybe make the leg/foot semi-flexible and attach the bend sensor
to one side of it so that it bends when the leg gives a little.
jonathan


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