I have always been a huge fan of pen-plotters, drawbots, and polargraphs — here’s a great plotter project built around Go + Raspberry Pi + Arduino that I can’t wait to try: Gocupi.
Basic polargraph description: Two stepper motors move a pen hanging from threads to draw stuff out on a whiteboard. A program written in Go runs on the Pi, it sends movement commands over serial to an arduino, which then pulses the step pin on the stepper drivers to make the stepper motors move.
This project is different from most other Polargraphs in that there is no step generation code on the arduino, everything is calculated in Go and then the arduino just receives a stream of step deltas that it stores in a memory buffer and then executes. Since all logic is written in Go running on the Pi it allows using more advanced interpolation models for smooth drawing, not needing to use fixed point or single precision floats for calculations, not needing to reflash the arduino often when making code changes, etc.
Each Friday is PiDay here at Adafruit, be sure to check out our posts, tutorials and new Raspberry Pi related products. Have you tried the new “Adafruit Raspberry Pi Educational Linux Distro” ? It’s our tweaked distribution for teaching electronics using the Raspberry Pi. But wait, there’s more! Try our new Raspberry Pi WebIDE! The easiest way to learn programming on a Raspberry Pi.
Want a FREE RASPBERRY PI? All orders over $350 get a FREE Raspberry Pi Model B with 512MB RAM!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — More on Makerbot
Wearables — Faith, trust, and LEDs
Electronics — Don’t float!
Biohacking — “Wireless signal sent through meat fast enough to watch Netflix”
No comments yet.
Sorry, the comment form is closed at this time.