Dimming AC Using A PIC10F200

Posted on Aug 19, 2012

The IR remote control for the system is also based on a PIC10F200. It uses the wake-up on change function of the I/O to wake it whenever a button is pressed. It then generates one of two different modulated outputs, depending on which button was pressed. The carrier frequency is 38 kHz to match the receiver modules in the dimmer circuit.

The software for the system is relatively simple. When an AC zero voltage crossing is detected on the GP1 input, the change in state wakes the microcontroller using the Reset-on Change function of the pin. The microcontroller wakes and determines the

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