Carbot Lite was built on commission with the idea of being a smaller carbot than my other versions. This version has only two suction cups, and was designed to not follow the normal radial style of the others. It has 3 4700uF capacitors in parallel, with a single 43x34mm Solar Cell providing 5V@ 40mA.
I typically use the MCP-112 450E for my solar engines, but I was concerned that the 4.7V trigger point would be too close to the max voltage output of the solar panel, so I opted for the 315E variant which triggers at 3.08V. This would result in less power to the motor, so I would have to make sure the spinner was light enough to get a few spins in. I also had to be careful to make sure the spinner was balanced, as this bot would be stuck to a window, and gravity would take effect.
The brass wire used as the frame is 12 gauge round half-hard brass wire. It was shipped coiled. So I had to find a way to straighten it out as best I could. I grew tired of using jumbo paper clips, which were actually steel and didn't solder as well as I wanted. Luckily I found this video on youtube which provided an elegant solution to my problem!