High-Inductance Coil Lab Supplies_Scoops & Spatulas Three-speed manual transmission with reverse

Three-speed manual transmission with reverse in a clear-plated case

Sliding-top wooden box 5 x 2 x 1 inches with a recess sized for a pair of 100mm (4-inch) bar magnets plus their keeper

with DC output to 25V and AC to 24V at up to 6A for classroom electronics

Amoeba Proteus model at 1000x magnification reveals extended pseudopod

and three low-friction nylon wheels for straight-line momentum experiments

High-Inductance Coil Lab Supplies_Scoops & Spatulas Three-speed manual transmission with reverse1100 turn copper coil on a bobbin sized for a double C core, providing roughly 15 henries of inductance for AC experiments on phase, impedance, and stored magnetic energy.