Intro to CircuitPython with a Python Heart Matrix Project, by @baldengineer
Big thanks to James “baldengineer” Lewis who gives a quick breakdown of CircuitPython and its various attributes in a recent blog post, then shows off an LED matrix heart project he designed using CP. His schematic is above and code is available on his website so you can take a look at it yourself – this is a bit more sophisticated than a simple blink project, so if you’re looking for something a bit more next-level check out this project.
The first bit of code I wrote, didn’t work. Multiple LEDs were turning on at the same time. I stared at the code for what seemed like hours. (It was probably 30 seconds.) Then I started changing bits of code to see how the matrix’s behavior would change. With each change, I just hit save and immediately saw the result.
At one point, the REPL interface enabled me to drive individual pins manually. That is when I realized, the behavior only made sense if the transistors on the bank select were PNP. Guess what. They were.
Could I have done the same thing in C? Of course. However, it would take several minutes longer. The re-compile and upload time adds up. I am not ashamed to admit maybe even 10 minutes longer with how many changes I made to the Python code.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.