Need to convert 0-10 VAC signal to 0-3.3VC

Hey guys,

I am using a sensor that outputs a 0-10 VAC (alternating current) and I need to convert this signal into a signal within 0-3.3VDC (direct current). What is the best way to go about doing this? Is there an integrated circuit/breakout board that will take care of this conversion?

Couple resistors and a cap are all that is needed.

What's the "nature" of this signal? Is it an analog signal where you need to know if it's 1V, 5V, or 10V, or is it an on/off digital signal.

If you just need to detect the presence or absence of the signal you can use a voltage divider to knock-down the voltage and a protection diode to kill the negative half of the waveform.

If you need to know the voltage you can use a precision rectifier (op-amp circuit) followed by a voltage divider.

In case you are not aware of this, a 10VRMS sine wave has positive & negative peaks of about 14V.

^ If "10volt AC" is all we know, we might give the wrong answers.

As DVDdoug said, a 10volt sine wave is ~28.3volt peak/peak.

A sensor data sheet would be very helpful.

Yes, we need to know how you want to use the signal, is the signal 10Vac peak or RMS for a start.

Tom.... :slight_smile: