Jeffery the junkbots book is great, but you must visit the bug fixes at junkbots.solarbotics.com... there are a lot of small errors which snuck into the pics. ...
41841
john isaac id mumford
sonofmumfy
Mar 2, 2004 11:46 am
Good morning guys, durring my long weekend, i built the walker from the junkbots book, it still needs some tuning but it basicly does what it is ment to. i was...
41842
Terry Slocum
illusiveimage
Mar 2, 2004 3:19 pm
Hi, This is a repost from the beamrobotics group. I just found out that that group isn't really active anymore. I am new to BEAM. So far I've built a couple of...
41843
J Wolfgang Goerlich
jwgoerlich_us
Mar 2, 2004 3:49 pm
... Welcome to the group! Yes, Chiu is closing up the Beamrobotics group. Plenty of help over here, though. ... By "stock solar roller," I am assuming that you...
41844
Stephen Brown
psycholist2000
Mar 2, 2004 4:18 pm
I draw them with the bottom five buttons down the left of the screen. "Group" to make a component. "Save" custom componet. It is easy with a little practice. ...
41845
Stephen Brown
psycholist2000
Mar 2, 2004 4:35 pm
If the trigger voltage is below 3volts then put your solar cells is parallel. This should double the amout of current and shorten your charge time. Parallel =...
41846
Bill
joshkabob2003
Mar 2, 2004 4:45 pm
I'm trying to figure out the negatives to using a 74ac240. I know the ac240 provides a better current for driving motors then the hc240. Why sholdn't I alwasy...
41847
Neil
psyclesam
Mar 2, 2004 5:21 pm
Hey Bill, The spsh3 circuit uses inverters in the chip for various purposes. Some inverters are used for the 'brain' and the remaining are used as motor...
41848
Adam
morrows_end
Mar 2, 2004 7:48 pm
would it be possible to use a solar head that would look for sun, and when the light is found, the head would focus a lens (the lens is bigger than the solar...
41849
GrantM.
solargrant
Mar 2, 2004 8:15 pm
Definitely possible. I did some experiments with a frenel lens a few years ago, I could get about 100mA out of a SC2433 (regular 17mA) the voltage stayed fairy...
41850
Bill
joshkabob2003
Mar 2, 2004 9:00 pm
Thanks for the help. So to keep it a "Power-Smart" head I really should use the HC version whenever possible. I definitely want to keep the part count to a...
41851
eldkorpen
Mar 2, 2004 10:11 pm
Goldmine has a very cheap set of motors, check it out! http://sales.goldmine-elec.com/prodinfo.asp?prodid=8081...
41852
Adam
morrows_end
Mar 2, 2004 11:17 pm
Tom Gray mentioned using IR instead of touch sensors on his bot, and i'm sure he was just talking about the switches for the IMX reverser (which is also in the...
41853
Tom Gray
graybeard2ca
Mar 3, 2004 12:54 am
Hi, Adam I was talking about the steering switches, at one point, but I readjusted the physical contact sensors and the IR never got off the breadboard. I...
41854
Tom Gray
graybeard2ca
Mar 3, 2004 12:55 am
I bought two bags of those last year (two bags in order to get two of things). There were some nice motors and some current-guzzlers, anything from 0.5V to...
41855
Wilf Rigter
wilf_nv
Mar 3, 2004 2:07 am
The 74AC240 chips can deliver more current to a load compared to a 74HC240,. In fact, every 74ACxx chip has the same high output current rating which means...
41856
Adam
morrows_end
Mar 3, 2004 2:11 am
well, i'm at college, and i have no good equiptment anyway, i don't have the abiility to breadboard it, even at home, so that's why i left it up to someone on...
41857
Terry Slocum
illusiveimage
Mar 3, 2004 3:09 am
Thanks Stephen, I was thinking along those lines. I suppose it dosen't make any sense to have much excess voltage. I guess the internal resistance of a...
41858
Terry Slocum
illusiveimage
Mar 3, 2004 3:29 am
Hi Wolfgang, Yes. I did mean the solar speeder from solarbotics. As I mentioned in my reply I have an idea for being able to switch between parallel and series...
41859
Bill
wgowerm
Mar 3, 2004 4:51 am
Adam - ... The Sun us sufficienty distant that the rays can be considered to be parallel - so once the lens is "focused" it will never need to be adjusted...
41860
Stephen Brown
psycholist2000
Mar 3, 2004 6:22 am
Hi Terry, As Wolfgang posted, the series setup will give you bot a better (more consistant) performance in a wider range of lighting conditions. If your solar...
41861
Jeffrey D. Shaffer
oyume
Mar 3, 2004 6:36 am
Thanks again, everyone, for the input. I just ordered the Junkbots book as well as "Mobile Robots" which I've had my eye on for a while (despite being...
41862
WilliamChops Westfield
westfw
Mar 3, 2004 9:12 am
... harder to find. Probably more expensive. In the non-beam world, they're significantly slower (you know; 1MHz instead of 10MHz or some irrelevant (to...
41863
Adam
morrows_end
Mar 3, 2004 6:04 pm
i had to "borrow" my roomate's boom box IR reciever, and some stuff off on some robots, but i tried that circuit out with LED's. the only way i could get it to...
41864
Bill
joshkabob2003
Mar 3, 2004 6:27 pm
Thanks for the responses. I'm really sorry about the spelling (see below). Fingers tend to type what they want. :( Bill...
41865
OF Bell
atrahasis1982
Mar 3, 2004 7:17 pm
Among the many caps, resistors and other useful bits and pieces I have recovered from various PCBs, I have two components with the following markings: The...
41866
J Wolfgang Goerlich
jwgoerlich_us
Mar 3, 2004 8:44 pm
... I like that phrase, DrewB. Terry, measure your solar cells in series under the race lighting conditions. If you are much over 5V, then you should wire the...
41867
dragonair78
Mar 3, 2004 9:07 pm
Hi everybody, I got 2nd place in the science fair. Thanks for all the help. Joe Garcia...
41868
Stephen Brown
psycholist2000
Mar 3, 2004 10:43 pm
Congratulations Joe! Just remember the real prize is not the ribbon you take home, but the experience and knowledge you gained. And I can see from reading your...
41869
shenri
Mar 4, 2004 1:18 am
I also have lots of the C945's. The c945 is a Japanese NPN transistor with the pinout being E-C-B. Any time you see a component that looks like a transistor...
