This 1995 circuit directly controls a triac. The triac, in turn, controls the external load. Times can range from 1 second to 72 hours and 12 minutes. The accuracy of the circuit is very high since it uses the signal from the power grid as a clock. The circuit includes its source and the triac must have a heat sink.
| Clique na imagem para ampliar |
| Clique na imagem para ampliar |
