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Retro Wristwatch

The first digital watches had this red bubble display, you need to push a button to see the time.

saarbastlersaarbastler
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632 views
2 comments
633 followers
6 likes
  • Description
  • Details
  • Files 0
  • Components 9
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  • Logs 0
  • Instructions 2
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  • Discussion 2
  • The 2018 Hackaday Prize
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  • saarbastlersaarbastler

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  • RetroWristWatch
hardware
completed project
Software
3dprinting 2018hackadayprize

Related lists

2018 THP: Digikey Parts

Hackaday Prize entries using Digikey parts

2018 THP: Microchip Parts

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2018 Prize: Time Lord Achievement

2018 Hackaday Prize Achievement: You project is a blast from the past! Retro looking projects or projects using actual old parts.

This project is submitted for

  • Coin Cell Challenge
  • The 2018 Hackaday Prize
  • Open Hardware Design Challenge

This project was created on 01/07/2018 and last updated 2 years ago.

Description

A four digit bubble display shows the time and date. An Atmega 328P and a DS1337 powered by a 2032 coin cell. The PCB has been milled on my Stepcraft 420. The case is printed using a RF1000 3D Printer.
The Software is written "bare metal" using Atmel Studio 7.
All files are published on my github account.

Components

  • 1 × Atmega 328P
  • 1 × DS1337 Clock and Timer ICs / Real-Time Clocks
  • 1 × 32,768KHz Quartz
  • 1 × 4 Digit bubble Display QDSP-6064
  • 4 × BC848B NPN Transistor

View all 9 components

Build Instructions
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  • 1
    Step 1

    See details on https://github.com/saarbastler/RetroWristWatch

  • 2
    Step 2

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saarbastler wrote 01/13/2018 at 15:11 • point

Thanks for cour comment. I'm using the wristwatch since more than half a year, and it's still the first battery in.

But I started thinking about a charger. An external modified TP4056 should work. Something like the $1 Coin Cell Charger. I just need to add a connector for charging.

A build-in charger would consume a lot of space.

  Are you sure? yes | no

Mike Szczys wrote 01/11/2018 at 21:55 • point

I really like the look of these bubble displays and have been meaning to do a project with them. Your overall aesthetic on this one is quite pleasing... the bright blue body next to the copper clad is quite nice!

This would be great with a rechargeable coin cell and with the charger built-in.

  Are you sure? yes | no

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