The Endicott Coil Company was established in 1954, manufacturing coils for IBM circuit boards. Over the years, the company has widened its scope, and now does business in the military, aerospace ...

Under the coils was a shielded circuit board. iFixit also offered a comparison with the Apple Watch charging puck, which internally appears to be surprisingly dissimilar to ‌MagSafe‌.

Electromagnetic forces are used to cause that spinning action. In this case, Carl has built the electromagnets as coils on a 4-layer circuit board (six coils on each layer).

Two jumper wires connected from the coil’s circuit board to the 5V charging input are all it takes to finish up the hack. Posted in Android Hacks Tagged charger, g9t, gemei, ...

Designed as an educational development kit for experienced hobbyists, the 10-inch tall oneTesla music-playing Tesla coil is capable of producing artificial lightning arcs of almost two feet in length.

Nikola Tesla - The Tesla Coil. To investigate the electrical realm of high-frequency and high-voltage, Tesla invented an apparatus that pushed the limits of electrical understanding.

The circuit uses an inverted 555 oscillator that is coupled to an ON Semiconductor BU323Z Darlington transistor (350V, 10A) that drives a conventional inductive discharge ignition coil. In this ...

Figure 1 shows a simple circuit using the MC9S08QE128 microcontroller from Freescale to drive a Finder 40.61.6.005 single-coil latching relay with a standard ULN2003 Darlington driver with open-drain ...