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For Sale / For sale: Salvaged wheelchair motors - (3) pair / (6) tota
« Last post by Maynard Rowley on Yesterday at 06:18:47 PM »
(3) pairs of wheelchair motors as shown in pics. (2) pair of the AMT Schmid motors & (1) pair of the Invacare. Located in Canada but will ship anywhere (you pay shipping).

Make me an offer. I'll sell as a lot or individually.
Misc / What is meant by forex trading?
« Last post by Deepakcandyman on June 23, 2017, 06:46:58 AM »
What is meant by forex trading?
Electronics / Help needed-4 Pin RGB Cathode LED
« Last post by ToyhackRobotics on June 22, 2017, 09:29:55 PM »
Hi everyone, i've been building my humanoid robot for a short while now, and at the moment i'm having a very hard time trying to successfully have 2 of them work in sync for they are the eyes for my robot.

I have 3 digital out pins on my robots brain, so i thought the 4th pin remaining would need to go to a ground source?

When i tried this i never had the color sequence happen with the 4 pin cathode led, with a simple 2 pin cathode rgb led they work great, but has been impossible to get them to sync.

On my rgb led's i have red, green and blue.

I'm using the ez-robot ezb4.

I'm not good with electronics, ive looked at google images and have trouble making sense of them, i can wire up simple things, etc but have never done rgb led's before, and this is my first robot so also new to robotics and programming...and currently using Blockly for my project.

Any help would be greatly appreciated thank you.

Mechanics and Construction / Re: Actuators too small to simulate human arm?
« Last post by Michael7S on June 20, 2017, 10:10:24 AM »
For now I've used a spring assist for the first 2/3 of the travel.  The last third is pure drop.  This approximates the human propulsion, though a light spring for 100% of the travel might be a touch better.

If I do go to actuated propulsion (and lift), the specs will be much clearer.

Thanks for your help so far.


Electronics / Re: Wireless boat for college competition
« Last post by actuonix on June 20, 2017, 09:32:34 AM »
I'd be interested in seeing this project. Do you have a link?
Software / Re: Android robot control app
« Last post by actuonix on June 20, 2017, 09:30:03 AM »
Misc / Re: What rights do robots deserve?
« Last post by actuonix on June 20, 2017, 09:28:05 AM »
I can't see how robots deserve any rights. .
Mechanics and Construction / Re: Actuators too small to simulate human arm?
« Last post by actuonix on June 20, 2017, 09:24:18 AM »
Did you get this sorted out? I agree with the above comment. Pneumatic is probably the way to go
For Sale / Re: I need a list of the cheapest parts for my first robot
« Last post by actuonix on June 20, 2017, 09:20:05 AM »
What type of robot do you want to build?
Electronics / Re: I fried my Sabertooth 2x12A
« Last post by Tommy on June 20, 2017, 08:16:57 AM »
2 200w wheelchair motors
Kisses, all the wheelchair motors I'v used with Sabertooth drives are over 400W.
             I'v had very good results with the 2x60 drive with these motors.

             if you power up the Sabertooth drive without removing or supplying power to
             the electric brake the motor could draw +40 amps.

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