OSH Park
Retro|Watch
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Retro|Watch
by
RafaelRiber.
4
layer board of
1.73x1.89
inches
(44.02x48.01
mm).
Shared on
June 30th, 2016 11:35.
Tested and working !
A retro watch, based around the HP QDSP-6064 Bubble display, used in 70s HP calculators like the HP-35. The display is controlled by an Atmel ATMega328P-AU MCU with Arduino code, and the time is kept by a Maxim DS3231 Real-Time Clock module, that stays connected to the LiPo battery at all times, keeping time even when the microcontroller and display are not powered.
The code and design files for this watch are fully open-source, and available on GitHub.
(DISCLAIMER: I am in no way affiliated with Atmel. I just put the Atmel logo on the PCB to show the circuit uses an Atmel chip, which I really like !)