Although not a true BEAM robot, this simple schematic by Randy Sargent is small, simple, slick, and effective. My own version uses a pair of pager motors and three cells from a 9V rechargeable battery. Hard to get any simpler than this device!
The Solar Marble Machine
Solar botics
May 17, 2014
... is here! Check it out in all it's glorious wooden-ness (Russian birch-ness even!):
Starting today the Marble Machine is available at our website for backorder, and fully available for purchase starting May 18. The Solar Marble Machine is a result of collaboration of Solarbotics with MSRaynsford, whose original design was reworked as a solar-powered version. Check out the video here.
The kit comes to you complete with all the components you need to build your own Marble Machine. The assembly is straightforward and well-documented, and you will only need a few hand tools. The wooden parts come in handy panels with additional instructions, and if you snap a piece during assembly, we'll send you out a replacement part (email sales@solarbotics.com for details).
Populate your desk with a self-sufficient wooden distraction and watch the marbles roll down automagically.
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.