I want to measure the voltage over time as the device discharges so I can calculate how much power each component uses. I will run the following tests:

• JP1 open, disconnecting the LED and microcontroller,
  • This should measure the self-discharge and leakage across the Zener D2.
• JP1 closed, running unoptimised naive code, blinking the message “ss s”
  • This should set a baseline for comparing power saving improvements to code.
• LED on 100%,
• LED off 100%,
  • These two tests should isolate the power consumption of the microcontroller from the LED.
• Power-optimised code blinking the message “ss s”.

Then graph everything and crunch the numbers.

My 121GW multimeter can log measurements to an SD card. For each of these tests I will charge the supercaps to maximum and then let it discharge to 1.4v.