Papercraft dial is the slide-ruler of current limiting resistors

led_resistor_dial_39

This paper dial makes selecting current limiting resistors a snap. [Giorgos Lazaridis] came up with the tool, which he describes in detail in the Worklog tab of his writeup. If you want one of your own he also posted a PDF which you can print, cut, and tack together. At this point we can calculate resistor values for LED circuits without looking at reference material. But it wasn't always like … [Read more...]

Build a clock using dials instead of hands

The-Sprintronic-Clock-with-Laser-Cut-Case

[Doug Paradis] found a simple way to use dials instead of hands on a clock. Actually, that's pretty much the entire hack... use dials instead of hands. He grabbed a battery-operated clock movement from the hobby store, then printed out one dial for hours, another for minutes, robert's your mother's brother, and you've got a new clock. The case seen above is laser cut, with a window and index line … [Read more...]

(Real) Stargate built in backyard

By some of us, I mean me. Srsly, tried to watch just one episode and couldn't finish. Still a cool hack though, mate.

PVC, wood, and some creativity bring this Stargate duplicate to life. [Mango] and his father started with AutoCad drawings taped together, and ended with the Stargate you see before you. Sure it's not 22 foot in diameter and not made of Naquadah, but its inner ring rotates and dials like the real thing and it has all 39 symbols - hand carved. Catch a fun and entertaining video with the Stargate … [Read more...]