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The Basic String Car is a simple project that consists of a battery, motor, pulley, and a bit of fence wire. The initial design of the car was made from repurposed parts and materials found in Grandpa's basement workshop. This version uses some commercially-available parts, but could be hacked with parts gleaned from old CD players, for example. What modifications and improvements would you make?
A different take on the beginning maker's second project (a clock being the first, of course). We added a motion detector to activate the fan when you're soldering and a USB reading light to eliminate the shadows. The unit employs a USB-rechargeable lithium-polymer battery and provides a separate USB port for the lamp. This solder fume extractor fits into an off-the-shelf enclosure; 3D printing isn't required. Drilling and cutting the enclosure requires some intermediate fabrication skills, but a layout and drilling template is provided to make it easier to prepare the plastic case.