This coil has no trouble shooting sparks across four meters of empty air. [Finn Hammer] has been putting in some long hours on this labor of love, and we put in some time reading through his progress thread. He started down this path about a year ago and every step of the way he produces [...]

[Clayton Boyer] took the electricity out of the useless machine, making one that runs like a clock. To this point, we’ve always seen these useless machine use electric motors. [Clayton's] cleaver design uses a wind-up spring and a series of wooden gears to bring the fun, making it a great companion for the binary adder [...]