I want to make a stand alone pyro board accessible over i2c. I have one breadboarded using a Darlington transistor that works just fine. However, I've been going over Altus Metrum's altimeter designs since they publish their schematics on the website. I understand how their pyro circuits work except for the comparators. Is the purpose of the comparators to disable the pyro channel if the battery is low?
This is from the Easy Timer schematic
full schematic
https://altusmetrum.org/EasyTimer/v1/easytimer-sch.pdf
This is from the Easy Timer schematic
full schematic
https://altusmetrum.org/EasyTimer/v1/easytimer-sch.pdf