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Projects, Designs, and Technical Stuff / Re: Coulomb counter IC for coin cell products.
« Last post by Psi on Today at 12:11:39 pm »hm.. I wonder how small one could build a circuit that reads the voltage difference across a current sense resistor and translates that to rate of charge into a capacitor. The more current through resistor the faster the cap charges. Then have it trigger an interrupt on the MCU when it reaches a maximum cap voltage. MCU wakes up, increments a counter and discharges the cap back to zero then goes back to sleep. An advantage doing it this way would be that it's all done as analog circuity so it should handle pulsed loads like BLE very well.
Just a thought, probably not very practical, accurate or low power.
Just a thought, probably not very practical, accurate or low power.