I'm trying to measure the current draw of a wireless doorbell to see if I can power it directly from my Arduino (with external 1A power supply) alongside a servo and some LEDs. Also to find out what if any resistor it would like used in line.
I'm using three the double 'A' batteries it is normally powered by and I have put the multimeter in line. So I have the black lead in COM and the red line in the 10A socket.
The circuit works - the doorbell works - but I don't get any reading on the multimeter, which is very sad. Any ideas? The multimeter, the Elit 70A, is pictured below. I have it on the 'A' setting.