I finished working with the reverse-turn circuit. It works just as I wanted. In fact, it's working even better because there are some "unusual" things...
http://www.geocities.com/beamrx5/index.html im having errors loading other pictures... :( well, there is a 1st for everything.. :) thanx.... enjoy..... -ralph...
If I understood your requirements correctly, this circuit generates a small positive pulse (instead of a long negative pulse) that toggles a shok bicore enable...
Hello all, Sorry if these seem like basic questions but I've googled for ages and haven't come up with an answer :o( What's the difference between a photodiode...
Hello Gareth, ... A photodiode cannot emit light, only detect it. In "regular mode" (anode + positive, cathode to negative) the photodiode will produce ...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the beam group. File : /S2010188.JPG ...
beam@yahoogroups.com
Oct 3, 2005 12:39 am
51140
Hi Wilf, what an interesting idea. I can see how the circuits are amplitude modulating the IR beam (via the ramping triangle wave), but how are they frequency ...
Hi Jo, I should have pointed out that this idea uses either AM modulation OR FM modulation but not both. Cut, paste and MODIFY darn it! You are absolutely...
I do believe that the word "sexy" is not out of place for this robot! any videos? looks wicked, Tom Elner ... www.computerfreaks.pwp.blueyonder.co.uk BEAM...
Hi Tom! Well, no new videos yet...sorry for now. But you can still look or download it's old videos at: http://haroldsbeambugs.solarbotics.net I guess those...
It generates a negative/positive (it doen't matter) pulse, then after a delay and before the first pulse has ended, it generates a small negative pulse. Took...
... I have always wondered how "less sensitive" LEDs can be. If I'm going to use them for something simple like detecting where the light is comming, is it so...
... going to use ... is it ... BEAM bots ... sensors ... LEDs vs ... I am pretty sure than sensitivity ranges (greatest to lowest) from phototransistors, to...
Hi Robert, You have the device sensitivity ranking right for "photocurrent" but when it comes to "photvoltaic" performance, there are subtle details that can...
Hi, I've just completed freeforming a mini sumo that uses ir leds and photodiodes to detect the edge, it performs fine but its too big for competition unless...
Do your robots wheels contact the floor when it's in the starting position? If so, you may be able to do it in two steps: 1 Momentarily drive the wheels CW to...
I think he meant the robot has to be sideways. Pretending the robot is sideways: Make a wheel wide enough so that it touches the floor when it's tilted. Add...
A thought experiment: How about a disk mounted like a hubcap on the wheel that faces down. The surface of the disk must have a high friction coating. The disk...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the beam group. File :...
beam@yahoogroups.com
Oct 4, 2005 11:48 pm
51153
i am designing a line follower/photovore,and i'm not sure if i should use LEDs,photodiodes(which i can't seem to find or hack from anything nearby), or...
Hi there! Well, an "LDR" or photoresistor could also be used. Try to find some and I'm sure it will work just fine. Also, a phototransistor or a photodiode are...
Hi there! Well, it would be better to use an "LDR" type or the photoresistor as sensors for your line following robot/photovore. A phototransistor could also...
Hello everybody, I'm wondering what type of techno-trash you guys find gear motors in. Everything I take apart has built-in gear motors that can't be ...
Hi! No, you're doing just fine, regarding on salvaging gear motors. We all did experienced that or at least most of us. Just keep all those geared motors and...
You can always try and find a cheap robosapien or some B.I.O bugs on ebay they have preoper beam style GM's. Robosapien for instance has 7. ... motors. We ......
I recommend photodiodes or phototransistors with IR filters to filter the reflection of an IR LED used as a spotlight. Reflective optocoupler proximity...
could i get a good detailed description on what makes a 4 motor walker turn left or right while going forward? i've been plaing with mine, chnging things, but...
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