One advantage of solid-state relay (SSR) over conventional electro-magnetic relay (EMR) is its tear and wear free operation. S201S01 from Sharp is a good example. Here is the circuit diagram of a DIY ...

Do you have any information, including a wiring diagram, that can help me wire my Lionel No. 450 Operating Signal Bridge using AC relays? Thanks! — Fred Richmond As Lionel operators certainly ...

Figure 1 illustrates a variety of driving circuits, depending on the input-signal-logic levels, their coding, and the magnitude of the available supply voltages. The circuits in figure 1a through ...