In this project I take an old Motorola Bravo pager and replace its insides with my own PCB that fuses an ATmega328 (with Arduino bootloader), Bluetooth Low Energy, a vibe motor, a piezo buzzer, and some ws2812b leds. The original form is maintained, including AA battery power and two external buttons.
In it’s current state, the pager beeps, blinks, and buzzes whenever I get a text message. It’s a bit silly, sure, but a fun exercise in reverse engineering and design.
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