To avoid using potentially dangerous mains voltages, this demo uses the Digital to Analog Converter (DAC) to produce a sine wave. This video is a follow-on from the previous ZCD video https://www.youtube.com/watch?v=Kxnyk1T-iFw&t=96s Relevant Links: TB3138: ZCD Module on PICs http://ww1.microchip.com/downloads/en/appnotes/90003138a.pdf?utm_campaign=avrda&utm_source=YouTube&utm_medium=VideoDescription&utm_term=&utm_content=MCU8_howto_ZCD_on_START_MMTCha ZCD Design Center MCU8 Webpage https://www.microchip.com/design-centers/8-bit/peripherals/intelligent-analog/zero-cross-detect?utm_campaign=avrda&utm_source=YouTube&utm_medium=VideoDescription&utm_term=&utm_content=MCU8_howto_ZCD_on_START_MMTCha Atmel Studio 7 Design Center Page https://www.microchip.com/mplab/avr-support/atmel-studio-7?utm_campaign=avrda&utm_source=YouTube&utm_medium=VideoDescription&utm_term=&utm_content=MCU8_howto_ZCD_on_START_MMTCha GITHUB TB3233 code example https://github.com/microchip-pic-avr-examples/avr128da48-using-zcd-for-special-functions?utm_campaign=avrda&utm_source=YouTube&utm_medium=VideoDescription&utm_term=&utm_content=MCU8_howto_ZCD_on_START_MMTCha TB3233 Using ZCD to implement special functions (and code example http://ww1.microchip.com/downloads/en/Appnotes/Using-ZCD-to-Implement-Special-Functions-DS90003233D.pdf?utm_campaign=avrda&utm_source=YouTube&utm_medium=VideoDescription&utm_term=&utm_content=MCU8_howto_ZCD_on_START_MMTCha AVR DA Curiosity Nano family page https://www.microchip.com/DevelopmentTools/ProductDetails/PartNO/DM164151?utm_campaign=avrda&utm_source=YouTube&utm_medium=VideoDescription&utm_term=&utm_content=MCU8_howto_ZCD_on_START_MMTCha AVR128DA48 Product Page https://www.microchip.com/wwwproducts/en/AVR128DA48?utm_campaign=avrda&utm_source=YouTube&utm_medium=VideoDescription&utm_term=&utm_content=MCU8_howto_ZCD_on_START_MMTCha https://www.microchip.com/design-centers/8-bit