The single transistor connected between the capacitor and the common side of the ac line allows a logic-level signal to control this triac power circuit. Resistor R2 prevents false triggering of the triac by the trickle current through the diac.
| SENSITIVE TRIAC CONTROLLER |
| Written by Y.Kwon | |
| Monday, 12 May 2008 | |
The single transistor connected between the capacitor and the common side of the ac line allows a logic-level signal to control this triac power circuit. Resistor R2 prevents false triggering of the triac by the trickle current through the diac.
Schematic of Sensitive Triac Controller |