Close

Component Values

A project log for ESP32 Current Sensor with WiFi

Arduino based monitor for two AC power circuits. Status display, and WiFi email

M. FosterM. Foster 08/07/2022 at 20:370 Comments

Referring to the great guidance from openenergymonitor.org, and based upon parts I had, the following values are used for the resistors and capacitor.

R1=R2 = 470K Ohm  (provides 1/2 divider for 3V VCC, lower quiescent power use)

R3=R4 = 22 Ohm (burden resistor for the current transformer)

C1 = 10 uF (allows AC current to bypass resistor)

Discussions