Hello Sir I want to design a multimeter using stm32f401Re. Thanks to your video, I made the screen of the multimeter using ssd1306. But I could not read the value with the ACS712 current sensor. More precisely, I see the value, but it is not correct. I watched your video about acs712. I wonder if you can design a multimeter using your stm32f4 board?
Thanks. ACS712 will measure accurately if the current is more than 1 ampere. It may not be accurate for small currents in mA if the ACS712 sensor is cheaper quality. To get higher current you need low resister load (less than 1 ohm). If you don't have 1 ohm power resistors rated more than 25W, you can use long wires (around 100 metre-500 metre) as load
