Fresh hacks every day
[Harm's] tumbling robot from a few years back is an excellent study in simple motion. Foregoing wheels or legs, he uses four flippers to roll the robot around the room. Two motors are used, each in charge of two flippers. Identical but separate circuits drive the motors with a 74HC240 gate IC monitoring the continuously rotation. When a flipper becomes … Read the rest
The team from Tech-On has taken the time to teardown two interesting microprojectors. The first model they tackled was the Optoma PK101. It’s based around a digital micromirror device (DMD) like those used in DLP. Separate high intensity red, green, and blue LEDs provide the light source. A fly-eye style lens reduces variations between images. They noted … Read the rest
Etsy places a spotlight on tinyminds, creator of the much-hyped solar robots. [Jenny], the brains behind tinyminds and self-described “all round nerd and non-stop crafter”, claims to draw inspiration for her BEAM solar bug and monster robots from things as varied as paper and wood. She describes the process of creating her robots and working with solar energy as … Read the rest
We spotted [Kerrin Mansfield]‘s lovely solar engine on ladyada’s rantings. It uses 16 1/8th inch solar cells to collect power. At night, an orange LED pulses at .2Hz. He doesn’t have a specific write up on the construction, but from the component layout, it looks identical to [Gareth Branwyn]‘s schematic in Make 08, which you can find in the … Read the rest
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