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I currently have a current transformer that generate a 0 to 0.7 V AC voltage (in my case) when reading. It is actually an SCT013A current transformer.

I would need to simulate it using ESP32, so basically create a 50 Hz PWM signal that can vary from 0 to 0.7V over time.

My idea is use another pin to create the desired voltage, for example 0.65 V, by an analogwrite for the PWM generation but I have no idea on how to create it by a schematics.

Could someone move me in the right schematics direction or have an alternative idea?

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  • \$\begingroup\$ ”0 to 0.7 V AC current” That would be voltage, not current. Is you end goal to be able to set a 50 Hz sine wave amplitude between 0 and 0.7 V? \$\endgroup\$
    – winny
    Commented Aug 31, 2023 at 8:29
  • \$\begingroup\$ hello, yes sorry I wrote bad. \$\endgroup\$
    – mapomapo
    Commented Aug 31, 2023 at 8:55
  • \$\begingroup\$ Is this a one-off? If yes, I would consider letting the ESP32 generate the 50 Hz waveform at 0 dBFS, AC-couple via a capacitor and having an VCA do the heavy lifting of scaling it to your desired value. Otherwise, a slow but high-bit ADC would do the job as well. \$\endgroup\$
    – winny
    Commented Aug 31, 2023 at 9:06
  • \$\begingroup\$ hi winny, what you mean for VCA ? \$\endgroup\$
    – mapomapo
    Commented Aug 31, 2023 at 11:10
  • \$\begingroup\$ Voltage controlled amplifier. \$\endgroup\$
    – winny
    Commented Aug 31, 2023 at 11:35

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