Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
for Agent 009 information, MCU is microcontroller unit. Vincent, i 'm not sure if i could help, but if you want to measure the AC 220V voltage for zero crossing detection, you can look some samples at zilog website or you can serch through the net on zero crossing detection circuit.