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 ...

In the design (Fig. 1), K1 is a 5-V dc, dual-coil magnetic latching relay with DPDT contacts.If you search the various distributor offerings, there are about 70 different models of this type relay ...