Good old electromechanical relays are relatively expensive where any significant current has to be switched and switching times must be short. One solution is to go over to solid-state relays (SSRs). In DC mode, MOSFETs offer a very interesting solution, and the various manufacturers today offer devices at less than £4 with amazing performance, in terms of both current and low R_(DS)(_(on)). They're relatively simple to use, in both monostable and bistable modes, so why stint ourselves?
展开▼
