Contrib Cal
A physical GitHub contribution calendar and essential self-host software deployable with a click.
Contrib Cal
Open-source, hackable, and judging you silently.
A glowing, hackable GitHub calendar that transforms your coding activity into a physical light display.
3D-printed, NeoPixel-powered guilt trip:
- Turns your GitHub activity into a glowing desk monument
- Built on Raspberry Pi Zero W
- Pulls your real GitHub data
Key Features:
- Lights up with every commit—green for wins, red for shame (fully customizable)
- Runs Python and Shell based firmware
- 3D-printed enclosure
- Custom PCB from PCBWay
Perfect for developers who:
- Want to flex their streak in the physical world
- Need a blinking reminder when commits are missing
- Miss the dopamine hit of hardware hacking
- Would like to easily utilize tools like Pi-hole, TailScale, Syncthing, annd more
See your commit streak—in real life
Flex (or regret) your coding habits
Hack it with MicroPython
Estimated Price
- Fully Assembled: ~$100
- DIY Kit: ~$70
Pricing includes everything needed to build it. The assembled version covers labor and testing. Kit version is for makers who want to build it themselves!
What It Is
Contrib Cal is a hackable GitHub contribution tracker powered by a Raspberry Pi Zero W. Visualize your coding activity with vibrant LEDs, and unlock useful features and integrations for makers, coders, and tinkerers.
3D-Printed Case and custom PCB
Customizable design, solder-free LED matrix, or pro-grade PCB
Weather Animations
LEDs display sun, rain, clouds, and show current temperature
Addons & Integrations
Tailscale: Secure remote access
Syncthing: File sync server
Pi-hole: Network-wide ad blocking
Web Interface
Control LEDs, settings, and addons from your browser
Note: All features are fully customizable in Python. Addons are optional and can be enabled/disabled in the config or web UI.
Launch Plan
Email sign up
Express interest with no commitment required
50+ signups
We'll move forward with production orders
Open-source fallback
All designs and code will be available regardless
Your interest helps gauge demand - no obligation!
Sponsored by PCBWay
Professional PCB manufacturing that brought this project to life.
Pro Quality
Fast Delivery
Global Ship
As little as 5 PCBs