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Electronics Teardown: Stelo Continuous Glucose Monitor (2024)
Power testing a consumer continuous glucose monitor
In a world where glucose monitors are >100$ on Amazon sans insurance, Dexcom offers an affordable ($50) CGM with easily accessible data export, sampling your blood sugar every 5m and passing it to your phone via Bluetooth. 15 days is an incredibly square number, which led me to believe that Dexcom is "guaranteeing performance" by imposing an artificial software lifetime limit when the sensor could really go for longer. The stuff I do know: the nRF costs about 2-3$ in bulk, passives I can't imagine exceed 50 cents in total, and the board is likely under 1$.
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