Coasterbot moves!
With the electronics done, it was time to go back and work on the chassis. As before, the DVDs are linked with screws. I wanted the servos to be firmly attached. Since we removed the controller units, this left a lot of empty space in the case, allowing for this type of attachment: I still […]
Finishing up the coasterbot electronics (mostly)
After building the Ardweeny, and modifying the servo motors, there was only one major bit of soldering left: the breadboard voltage regulator. The Ardweeny requires an input voltage of exactly 5V, a common requirement for many chips. This is solved by using a voltage regulator. This is available as a simple component ($1.59 from RadioShack) […]
Spinning our wheels
We need a way to make the coasterbot move, and without getting too exotic, this means adding some wheels. And some motors to make them turn. The Jameco bundle includes two Hitech HS-322HD servo motors. Once again, this was all new to me, so I did some reading. Servo motors are used to precisely position […]
Ardweeny adventures, part two
I have a working Ardweeny! The Solarbotics replacement kit arrived this afternoon. I assembled it as before, with a few differences. The male programming headers were put in with the proper orientation. And I decided to test the Ardweeny without soldering the chip in at first — the pressure of the outer pins holds it […]
Ardweeny adventures, part one
The parts bundle for the coasterbot includes a microcontroller to act as the brain of the robot. It is an Ardweeny, made by Solarbotics. Billed as the “smallest, handiest, bread-board friendly Arduino-compatible”, it literally fits on the back of the ATMega328 chip. It’s a pretty cool design, and incredibly small, as you can see in the […]
Constructing the DVD chassis
I was pleasantly surprised to find that my blog of the coasterbot build has been featured in MAKE: Robot Build Dispatch #5. Fortunately I have been working on the bot, so I can add some new material. For this installment I’ll continue discussing the chassis design. As described in an earlier post, I want to […]
Speed Vest on the road!
The Speed Vest went for its maiden voyage today. The video below shows me riding it at night outside my house. If you can’t see the embedded video, here is the direct YouTube link. For the record, I can bike faster than 6 miles per hour, but we had to work around the limitations of […]
Finishing touches for the Speed Vest
With the electronics complete, there were only a few steps left to finish the Speed Vest. The digits had been sewn into a large piece of black denim cloth. It was now time to put this in a more attractive shape. After some consideration I decided to go with a trapezoid, as the original authors […]
Boxing up the Speed Vest
The original MAKE article on the Speed Vest was cavalier with respect to the packaging. The authors state that they simply threw the parts into a small soap box. They also mentioned that the electronics kept getting accidentally ripped out and had already needed to be redone three times. It seemed like some improvements were […]
Speed Vest digits lighting up
An important part of the Speed Vest project is shaping the electroluminescent wire into digits. The original creators provide a layout template, which has odd digits only on the right, and 0 through 6 on the left. I wanted to do all possible digits on the right, leaving me with only 1 and 2 on […]