https://github.com/lukas2511/wortuhr

Wortuhr.
https://github.com/lukas2511/wortuhr

Last synced: about 2 months ago
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Wortuhr.

• Host: GitHub
• URL: https://github.com/lukas2511/wortuhr
• Owner: lukas2511
• Created: 2015-03-22T04:20:58.000Z (almost 10 years ago)
• Default Branch: potato
• Last Pushed: 2021-10-31T15:49:25.000Z (about 3 years ago)
• Last Synced: 2024-10-19T06:00:42.589Z (3 months ago)
• Language: C
• Homepage:
• Size: 192 KB
• Stars: 3
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
Word-Clock controller using Pi Pico (rp2040) Microcontroller

Time is given by an external battery-backed DS1307 RTC, driven via a

bi-directional voltage shifter (DS1307 is 5V only, Pi Pico is 3.3V only).

Doing it this way as I'm just using what I had on hand.

A small I2C OLED display on the backside is being used to display date

and time, with a single button for configuration.

In this setup each word(-segment) is connected directly to the pico.

There are 24 segments which need to be controlled, so I need 24 GPIO pins.

In theory the pico has 26 GPIO pins, but two are needed for I2C and

I needed another one for the button. Luckily the LED can easily be

desoldered and with a wire added I got another GPIO to use.

I'm trying to keep the time on DS1307 in UTC, so I have a fixed time-base

to calculate if I need to add a +1h offset for DST.

The clock can either be set using the button and display, or quickly via

the usb serial console of the pico:

`date -u +"S%Y-%m-%d %H:%M:%SF" > /dev/ttyACM0`

!["Screenshot"](https://raw.githubusercontent.com/lukas2511/wortuhr/potato/screenshot-front.jpg)

!["Screenshot2"](https://raw.githubusercontent.com/lukas2511/wortuhr/potato/screenshot-back.jpg)