I want to measure 100A AC/DC current.
i found one current sensor.
it will work with arduino nano?
Please help ![]()
It looks like it could work. Do you have the manufacturer, part number, and specs for the PC board assembly? Without the datasheet it's a shot in the dark.
The [u]WCS1500[/u] is only the current sensor module.

This is possible?
The first module you posted has digital out as well as analog and no relay.
Don't apply 8 Volts or you can damage your Arduino.
The specs for the WCS1500 (without any additional circuitry) say 11mV per Amp. With the additional unknown circuitry, we don't know.
The Arduino's analog input can read 0-5V with the default 5V reference. The 10-bit analog-to-digital converter reads from 0-1023, so that's about 5mV (0.005V) per count (or ~2.2 counts per amp).