Mojo (short for “More Joules”) is a small, inexpensive Notecard companion device that measures energy usage in a battery-powered system. Inspired by the Joulescope and powered by a low-power coulomb counter, Mojo is designed to give product builders an inexpensive way of measuring the performance, charge, and state of deployed applications intended to operate on battery power over long periods of time.
Mojo is a small PCB that carries a LTC2959 coulomb counter from Analog Devices. The LTC2959 measures voltage, current, and charge accuracy to within 1% accuracy. The Mojo board includes two JSTs for connecting the battery in and out to a load like a Notecarrier. two JST cables and two Qwiic cables.
Mojo is intended to be used with the Notecard, and includes two Qwiic connectors for wiring the board to a Notecarrier or for daisy-chaining multiple Qwiic peripherals together. When used with Notecard running the appropriate firmware, Mojo “just works” and delivers periodic (and configurable) power information over time so that you have an accurate, real-world picture of how your product responds to network syncs, regular application performance, and more.
Key Specs
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LTC2959 coulomb counter
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Two JST connectors for battery and load connections
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Two Qwiic connectors
Additional Resources