DE1: How to measure power consumption?

Hi, to measure the current drained by the board you need to place a series (shunt) resistor on the power supply line.

The current will be the voltage across the shunt resistor divided by the resistance value itself.

It must be a very low resistance with high accuracy (value: as low as possible) so that it does not affect the real current drained. You may put it on the main power supply line, but in that case you will measure the total current drained by the board.

If you need to know the current that only the FPGA uses, you will need to put a shunt resistor on the FPGA core supply line (you have to identify the voltage regulator on the board), check a suitable point to interrupt the supply path and insert the resistance.

Good luck!