She posts the project’s Hackaday.io site where Jean Simonet details what’s inside (i.e. no dice were harmed in this teardown). What makes things happen? Some tiny but sophisticated gear:
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Linear Battery Charger Controller Li-Ion/Li-Pol 15mA to 500mA 4.2V
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Power Distribution Switch
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Lipo Battery, 60mAh
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7uH wireless charging coil
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Omnipolar Hall Effect Sensor,
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Crystal 32MHz ±15ppm 8pF
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APA102 2020RGB LED 2mm x 2mm (“DotStar LEDs”)
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Full bridge rectifier – 200mA 80V
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nRF52810 Bluetooth microcontroller
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LDO Regulator, 200mA, 5 V
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3 Axis Accelerometer
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2.5V to 5.5V Synchronous Step Down Single-Out 0.6V to 5.5V
Quite smart for a small 20 sided package, achieved through flexible PCB folding and resin casting – see the video below.
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