Hi, i want to read an industrial 4-20mA sensor(9v supply voltage) with esp32 . The power supply is 24v from an air compressor. esp32 is 3,3v so i need to use a buck to convert the 24v down to 3,3v for the esp32. And because the output signal of the industrial sensor is a current it must be converted…

Esp32 and 4-20mA industrial pressure sensor

jremington May 15, 2022, 1:41pm 6

For a 5V Arduino, many people use 250 Ohms.

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