Let's Make Robots!


Cheap gearhead motor with built in encoder

I just saw that The Electronic Goldmine has the Faulhaber gearhead motors with built in encoders sold "As Is" for $2.95 (regular $11.95) because the ribon cable may have cuts in it and some motors may not work properly. Still, for the price of a pair at a regular price you get 4 pairs of motors to use in several projects, so I thought I should share. I've used these motors in my MiniEric robot and I'm very happy with them.

Live at Campus Party, Make Fun with People
Using a
## Update: Added some pictures from the mechanical prototype ## This is the Berliner. A small Start Here 2.0 robot that is intended to live in Berlin at the Campus … Read more

Solarbotics GM2/8 DC Gearmotor


I have been hard at work creating some new CAD models to share with the LMR team. 

This is the Solarbotics GM2 (or GM8 depending on the gear ratio) DC Gearmotor.  It is modeled in SolidWorks 2008 as a single part file, not an assembly, to reduce the file size.

Lowest RPM of an electric bike motor?

What is the lowest possible RPM of an electric bike motor?  It seems to be the cheapest alternative to a slow gearmotor.  Thanks.