This solid-state relay (SSR) or shield was found in a 1995 Electronics Now. The transistor can be the BC548 and any Triac of the TIC series according to the supply voltage and current of the fed load. The optical coupler can be anyone that has a phototransistor as an internal sensor. The Triac must have a good heat radiator. The circuit serves for 110 V and 220 V, according to the Triac. The circuit can be controlled by TTL and CMOS outputs with the change of R1, when necessary.
| Clique na imagem para ampliar |
