Do you need just the Pi 5 power usage or the real power usage?
For measuring the real power usage, you need an AC meter to see the difference in the power going into the power supply when the DC usage increases in the Pi. AC can be measured by a sensor clamped around the AC power cable.
For battery operations, where you want the DC power going into the Pi, clamps cannot work. You need something inserted into the power supply. Many DC current sensors can drop the voltage to the point where the Pi will not work. I found the problem occurs without a current measurement, just with a simple switch inserted.
There are USB power measurement devices and you need a really low overhead one to keep up the full voltage to the Pi. No or minimum cables as they drop the voltage. Use an official power supply as that starts at 5.1 volts instead of 5 volts.
For measuring the real power usage, you need an AC meter to see the difference in the power going into the power supply when the DC usage increases in the Pi. AC can be measured by a sensor clamped around the AC power cable.
For battery operations, where you want the DC power going into the Pi, clamps cannot work. You need something inserted into the power supply. Many DC current sensors can drop the voltage to the point where the Pi will not work. I found the problem occurs without a current measurement, just with a simple switch inserted.
There are USB power measurement devices and you need a really low overhead one to keep up the full voltage to the Pi. No or minimum cables as they drop the voltage. Use an official power supply as that starts at 5.1 volts instead of 5 volts.
Statistics: Posted by peterlite — Fri May 10, 2024 9:29 am