If you’ve been tearing electronic devices apart for long enough, you’ll know that the old gear had just as many mysteries ...

The GM High Energy Ignition (HEI) self-contained distributor and coil package is a slick upgrade for any small- or big-block Chevrolet engine over a breaker point ignition. But the HEI does suffer ...

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When the coil is activated, all of these relays’ contact’s switch. When the Base voltage of the transistor is zero (or negative), the transistor is cut-off and acts as an open switch. In this ...

Ignition coils play a crucial role in a vehicle’s ignition system. They serve to convert the battery’s low voltage into the high voltage necessary to fire the spark plugs. If there’s any ...

Takaaki Kasuga, a doctoral course researcher at the ISIR, and his colleagues created a hygrometer, which measures humidity in farm soil, by placing a coil, transistor and other parts on the ...

The circuit is a classic, but we love the resourcefulness shown. The ignition coil comes from a three wheeler, the primary power supply is a ATX supply from a computer and the oscillator is ...