Read AC Line voltage with Pi

155

01:54:39

Need Help! Trying to create a 120 Volt AC Sensor that converts the AC Voltage to a DC Signal. ie... 60 VAC it would output 0 VDC and at 200 VAC it would output 3.3 VDC. I would also like it to limit its output to 3.3 VDC so that it doesn't damage the Raspberry Pi GPIO. The GPIO would attach where the Volt meter is located now.
After building the circuit, the AC power on top can have its Voltage varied to see how the DC signal changes.
I'm going to be using this with a CT to make a Pi Watt meter.

published 9 years ago

rich11292000

9 years ago

Dont forget AC voltage is 1.414 higher than its rms rating. 120x1.414=169volts peak.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.