The first circuit is used to switch on the second one. The first circuit is a simple electromagnet in series with a battery or cell and a switch. When the switch is turned on current flows and the ...

It’s an electromagnet pendulum analog circuit. Whether you’re building it, or just studying the schematics, this is a fun way to brush up on the non-digital side of the craft. The pendulum is ...

The one that [Made in Poland] chose to sacrifice was particularly nasty and greasy, but after popping off the pulley, the treasure within was revealed: the large, ring-shaped clutch electromagnet.

Electromagnets are found in many applications ... Note: Although this procedure is relatively simple, it can have its difficulties. If you're having trouble, try adding a second battery, using ...