0

Raspberry Pi Python Adventures #piday #raspberrypi @Raspberry_Pi

Pi-A-Sketch

Here’s a great tutorial from Raspberry Pi Python Adventures that shows how to write code to control motors to create all sorts of geometry in the Pi-A-Sketch project! Via RaspberryPi.org:

Are you guys ready to look at the entrails of the Python? We are going to review the code for the Pi-A-Sketch. Liz already published the URL for the Pi-A-Sketch code on the raspberrypi.org site, but just in case, here it is again:

piasketch.py (bitbucket)

…Initially, I wanted a function to draw a line, and a function to draw a circle. That meant that I would have to write the guts of:

def line(x, y):
    pass

def circle(radius):
    pass

Right away I knew that I would need to do something based on Bresenham’s line drawing algorithm. Horizontal lines are trivial (turn one motor), and so are vertical lines (turn the other motor). Perfect diagonals are also easy to accomplish, since it is just a matter of turning both motors at the same time, for each step. Based on the direction of the steps, 4 different diagonal directions can be done.

Yet, with Bresenham’s algorithm, you can do a line of any slope. In order to save time, I was not going to do special case handling, and just do everything with his algorithm….

Read more.


998Each 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.

We now have Raspberry Pi Model B with 512MB RAM in stock and shipping now!


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 8,500+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – Python on Microcontrollers is here!

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!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Rethink Robotics closes shop. Long live collaborative robots #makerbusiness

Wearables — Cleaning is key

Electronics — Serial overkill

Biohacking — Biohacking Resources – Books, Talks and Podcasts

Python for Microcontrollers — CircuitPython @ Hackaday SuperCon #ICYMI @circuitpython @micropython @ThePSF #Python

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.