How to run electric match and microcontroller from a single power supply
You not only need to store enough energy to run the MCU, you also need to prevent it from being used up by the match as well.







simulate this circuit &ndash; Schematic created using CircuitLab

This circuit will allow the supply to charge up the capacitor, but not allow it to feed back into the supply when the match is triggered. Note that the voltage to the MCU will be reduced by the forward voltage of the diode.