LIGHTNING CALCULATOR TYPE B
In 1932, the Amateur Radio Relay League released a series of circular slide rules that allow for quick solving of commonly needed electrical engineering calculations called Lightning Calculators.
This reproduction of an Ohm's Law calculating model was created from digital scans. The base and wheel are cut from laminated cardstock, and the pointer is PETG.
Design files suitable for production on a Silhouette Cameo CNC cutting machine can be found on GitHub.
Original scans by Theodore Munk.
