Hi,
I need to measure the power consumption of arduino fio board for a school project. So, I want to measure current flow in fio for this purpose. I tried to measure the flow in a seraial circuit which is created by 3,7 v battery, 110k-ohm resistor and multi-meter however, the board did not work. Could you give me some advice about my little problem :).
Thank you!!
So if there was no fio, just the resistor and the battery, what would the current through the resistor be? Is that enough to run the fio? If not, then you need to find a way to get more current to the fio.
You have the right idea, but you need to look a little closer at what you are doing. Try applying ohm’s law.
Good luck,
Yeah, why 110k? What effect would that have on the current running through the fio? And what voltage is left applied to the fio power input? Start measuring (voltages) at each point in the circuit.
p.s. Please know that a multimeter in current mode has an internal resistance which will affect your readings. This is resistance in addition to the 110k that you used. Try to measure the resistance between the lead connectors of your meter with a second multimeter, for each current range. This leads to a concept known as ‘burden voltage’. The meter becomes a ‘burden’ in powering your circuit.
Youtube meter tutorial/burden voltage: https://www.youtube.com/watch?v=fRP98k3Rh1E