Posts tagged as:


Open Source AC Motor Controller Test.

June 18, 2012

While I’ve been out of town the last few days, some of my friends have been very busy on other projects. That includes our buddy, MPaulHolmes, who just posted a video of a first official test of the Open Source AC motor controller. If you want to follow the progress on the project, please check […]

Read the full article →

Laser Etching for Open ReVolt

March 17, 2012

Just about the only thing I don’t love about the Open ReVolt motor controller is the case. As cool as an Open Source Motor Controller is, it’s just not shown off with a basic metal cover. In fact, I actually drilled through the original cover (and put clear packaging tape over the holes!) to see […]

Read the full article →

PWM Disco Ball – Lights, Music, and Electric Cars

December 28, 2011

At home, I have a small LED light that is designed for use under cabinets. I use it mostly to illuminate one side of my aquarium, and I occasionally pull it out to use it as a light for filming video. The problem is that it is quite a bit brighter than the other LED […]

Read the full article →

VIDEO: Build Your Own Electric Car Motor Controller (Open ReVolt)

June 11, 2011

Last weekend, I had a great time at the Mother Earth Fair in Puyallup, WA. My friend Paul met me at the airport. Both he and I were presenters at the Fair. It was great to have such a fantastic audience for our presentations. Since I was already there, and had my camera handy, I […]

Read the full article →

PWM DC Motor Controller / LED Dimmer

April 21, 2011

Last week, I started work on a very basic DC Motor Controller.  It’s a really simple circuit that just turns voltage on and off, but very quickly (like about 1000 times a second..) By varying the time off vs time on of the circuit, a Light Emitting Diode (LED) can be dimmed, or a DC […]

Read the full article →

World’s Simplest PWM Motor Controller

April 16, 2011

Well, I did it! Knowing nearly nothing about electronics, I managed to finally build my own PWM (Pulse-Width-Modulation) DC Electric Motor Controller! OK, that makes it sound way too fancy. At the beginning of the semester, I signed up for a non-credit electronics class at the local two-year technical college. I’ve been wanting to take […]

Read the full article →

Open ReVolt motor load testing, the cheap and easy way.

April 1, 2010

My friend Chris is building an all-electric motorcycle, but  the best part is that he’s doing it with a very nice Open Source Controller. Built from a kit slightly modified from  Paul and Sabrina’s EV Stuff, the controller will handle 144V at up to 700 amps! Also, Chris’ cycle is off getting a body designed […]

Read the full article →

Chris’ Open ReVolt motor test

March 21, 2010

Chris has been real busy the last few days finishing off his ReVolt Open Source EV Motor Controller. He had a few concerns about hooking everything up right and trying it out. I suggested he simply hook it up to any small motor to play with it and make sure all works as advertised. Sure […]

Read the full article →

Open ReVolt – Another controller completed!

March 20, 2010

A while back, by friend Chris from our local EV Club started converting a motorcycle to electric. When it came time to find a controller, he wanted one that was good, fast, and cheap. Rather than settle for the usual two-out-of-three, he instead decided to build an Open ReVolt Controller. At about the same time […]

Read the full article →