Hello everyone, and thank you for sharing your work.
I built the ESR meter using an Arduino UNO and a lcd display CDL4162-HD44780.
My version can work in two ways: with Arduino UNO connected to the board face down, and in standalone mode.
In the first case, only the bottom side of the pcb is required (single side)
I also added a function that allows me, by selecting the right value of the DUT, to know immediately if it is good or not.
BUT there is a problem: If I measure a 1ohm resistor, the reading is quite correct, but if I measure 150mohm or 75mOhm, the reading is totally wrong. 
Is there anyone who can help me? Thank you. :~
