Breadboard Wristwatch: Prototyping Meets Wearable Tech
Discover the Breadboard Wristwatch, a hackable wearable built on a solderless breadboard with LED display, ATtiny84A MCU, USB‑C charging, and open‑source firmware.
Innovative Breadboard Construction
The Breadboard Wristwatch harnesses a standard solderless breadboard as its core, enabling electronics enthusiasts to rapidly prototype and modify circuits right on their wrist. Using a QDSP‑6064 bubble LED display, the design showcases how everyday prototyping tools can be transformed into functional wearable devices.
Smart Power and Display Management
At its heart lies an ATtiny84A microcontroller clocked by a 32.768 kHz crystal oscillator, serving both CPU and real‑time clock duties. Power comes from an STNS01‑based PSU delivering 3.1 V, recharged over USB‑C in the latest iteration. Schottky diodes cleverly multiplex the limited I/O pins, driving the LED segments and cathodes without additional shift registers.
Open‑Source and Customizable
Beyond telling time, this wristwatch doubles as a portable electronics lab. Its Li‑Po battery housing (37×23×3.5 mm) keeps the form factor sleek, while the open‑source ATtiny84A firmware on GitHub invites tinkerers to tailor features—from custom animations to sensor integrations—making it a versatile platform for wearable‑tech experimentation
