Just as a transistor may be considered as basically a solid-state diode with a third semiconductor layer added to form two back-to-back diode junctions, the SCR may be considered as a transistor with an additional semiconductor region. Simple models of the "lower order" devices may be analyzed, ther...

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When n-type and p-type materials are joined together, as shown in Fig. 5, an unusual but very important phenomenon occurs at the interface where the two materials meet (called the p-n junction). An interaction takes place between the two types of material at the junction as a result of the holes in ...

Bingo pinball games are a challenge. There are no two ways about it. They combine the challenges of fixing an electromechanical pinball game with additional pseudo random logic of the bingo game. Before beginning troubleshooting, be sure to have both the schematic diagram AND the game manual. The ma...

Functionally, a triac may be considered as two parallel SCR (p-n-p-n) structures oriented in opposite directions, as shown in Fig. 30. The same approach used to explain gating, latching, and holding currents in the SCR can be extended to include the two-SCR model of a triac. In triacs, the gate-trig...