yes, you can make substitions, provided... Make sure you replace NPN with NPN (PNP for PNP) certain transistors are "paired" with counterpatrs (2N3904 &...
Possible uses? How about a limit switch If the parts you have are the 'U' shape I'm thinking of, mount it so that the leg/head (whatever) turns to a point that...
Hey Neil, have you tried this Pummer circuit? You might want to consider it for your "zipper pulls" Less parts needed = smaller size : ) You can even make it...
Hey Drew, Very nice! If it pumms specifically when it goes under a streetlight (don't you think you should have been watching the road instead of your pummer?...
No It Pumms from the Strobe effect as I pass under several lights spaced about 10' apart. (they are that close in the parking garage, where I have to park on...
... You might want to add two valves. One to allow an inert gas to be pumped in and one to allow the air in the box to be blown out as you add the inert gas. ...
... You can get the photovoltic effect from a dual-color LED (2lead type)? Which way would the current flow? As I understand these are 2 LED's in a reverse...
A small bag of silica-gel would absorb moisture. Adi ... From: Gord To: beam@yahoogroups.com Sent: Saturday, February 01, 2003 10:04 PM Subject: RE: [beam]...
Yes Ori, I think you are right. External light is affecting the flash rate and turn-on threshold. The timing of the two LED version is quite different from...
... pumped in and one to allow the air in the box to be blown out as you add the inert gas. Inert gas would prevent corrosion but... Aren't these the gases...
Hi, I'm thinking about building a wind powered bot. This bot will be mounted on a kite with a small windmill to provide power. All I want is to blink a LED or...
The noble gasses (inert) are a good way to store electronics, because they have such a high electron negativity. They don't give off electrons, and don't...
If this is the reflective type and not the beam interrupting type, then it is often used as a paper detector with the white paper reflecting the beam. It can...
There are conformal coatings that completely cover a circuit board to prevent contact with the atmosphere. The bad guys that cause corrosion are generally O2...
... That sounds like an interesting robot. I hope you are successful, and post some photos. ... There was a lot of discussion on this topic a few months back....
If I remember correctly (I probably don't): if you have a motor with the specs 3v, 40ma, and 3000RPM, you would have to spin the motor at 3000rpm to produce...
Take a look here: < http://www.solarbotics.net/bestiary/1120_pummer.html > Hope that helps, Ori ... From: APS1986@... To: beam@yahoogroups.com Sent:...
I'll answer the last question since the others have at least been started on. When you use the motor to charge the cap (or battery) it's called regenerative...
Hi everyone, In my quest for head circuits that don't oscillate, I have come up with a pair of circuits. ... Circuit A: This circuit uses a pair of op-amps,...
Whoops, that Circuit B should be this one: Sorry about that, Ori ... From: Ori To: beam@yahoogroups.com Sent: Saturday, February 01, 2003 11:46 PM Subject:...
... Depends what you call high quality. I just did a little experiment. Hooked up two Solarbotics GM-2 gearmotors in parallel, mounted the wheel on one, and...
Hi Martin, This is actually good to hear. An SE with regenerative breaking would make very efficient use of the solar power as it is needed only for the...
How did the serviceman steal your Pummer? Just curious. Ben ... __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful....
Ben Micklin
kcimb@...
Feb 2, 2003 11:07 am
33569
Ori, I think there may be a problem with the second head circuit. Mainly, when it locks, the bridge outputs zero-ish volts, and the diodes do no conduct. So,...
On second thought, you only need one resistor in there, and it doesn't have to be a **14 either. With this change, the head must always be moving left (could...
... Thanks for confirming that. I thought so. and it doesn't ... Exactly! It's a pro if you are adding an optical bridge to a walker... no need to go Shmitt. ...
... Hi Ben, ... Wow, thanks for catching that! I had to go and check the bot to make sure :) The corrected schematic of the FLED Laser Light Head is here: < ...
*Wow, I messed up the image links :) Here is the message, corrected:* ... Hi Ben, ... Wow, thanks for catching that! I had to go and check the bot to make sure...
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