...oh, just save the Republic! Just got this note in from Rob Meyer, who is using 3 of our GM15 pager gearmotors to drive his 1/18 scale R2-D2. Given that the real R2-D2 measures 108cm tall, that makes this cute cousin only 6cm (2.36") tall! There's a GM15 for each of the drive wheels, and […]
Circuit: Stepper Motor
Dave Hrynkiw
July 12, 2007
This is a neat little one-chip circuit we originally tuned for use with our "SM1" Stepper motors. We've presently sold out of the motor, but this circuit has proved to be a good unidirectional (1-way) driver for small stepper motors. Parts required are:
- 74AC240 Octal buffer chip
- 4 x CP0.1µF capacitors
- 100k resistor
- 2 x 47k resistors
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Sumobot Circuits
We've been having fun playing with the L293D driver chip. It's one of those things to see how much you can make it do by itself (like with any BEAM application!). Grant McKee has been experimenting with some simple additions to the chip to make it (unto itself) a suitable brain for a simple mini-sumo […]
Not Your Average Door Bell
Wireless doorbells have a tendency to... suck. I speak from personal experience on such matters. When they fail to get my attention while at home, apathy generally wins out and inevitably forces me to head down to the FedEx/UPS depot to pick up my missed package. David Watson, a man of action, took matters into […]
Wheee! They're here - the new RW2!
We've just got in our newly-machined RW2 hubs & tires - and they're better! Instead of the old 1/8" axle hole that didn't quite fit the GM11a-14a series correctly (they were too loose), these new ones fit perfectly with their 3mm hole!
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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.