A generally accepted fact about relays and solenoids is that after they’re driven into the actuated state, only half as much coil voltage and therefore only one fourth as much coil power, are required ...

Several years ago, Paul Rako, in collaboration with the late, great Bob Pease, wrote a terrific article about the finer theoretical and practical points of electromagnetic solenoid-driver circuits. 1 ...

Chris Gregg has created a fantastic printer using a retro classic mechanical typewriter which can be used as a printer thanks to the power of the Arduino platform and a bag full of solenoids which ...