An Introduction to Solid State Relays
When we think of relays, we tend to think of those big mechanical things that make a satisfying ‘click’ when activated. As nice as they are for relay-based computers, there are times when you don’t want to deal with noise or the unreliability of moving parts. This is where solid-state relays (SSRs) are worth considering. They switch faster, silently, without bouncing or arcing, last longer, and don’t contain a big inductor.
An SSR consists of two or three standard components packed into a module (you can even build one yourself). The first component is an optocoupler which isolates your control …read more
