Automatic Control and User Interface for Central Tire Inflation System

[wanek]

or you just can use a big enough trimpot (say above 2k).
see this topic:

[SOLVED] ACS712 Voltage & Amps -- Ghost Readings!

DO NOT DO THAT!!! the theory is ok, but the resistor values you have chosen are way too low. lets do the math: 5 ohms + 10 ohms = 15 ohms, at 5volts. using ohms law, you can calculate the current: 5v / 15 ohms = 0.333amper this means you will have a current consumption of 0.333amper on your voltage divider!!! beside that gives 0.333a x 5v = 1.66w heat generated on the resistors, it will also put an unnecessary stress on your usb port. for voltage dividers we always use a much higher resisto…