Hello Adafruit people! I just wanted to share a project I’ve been working on. Much of the core componentry came from your lovely shop and your tutorials proved quite helpful.
Over the last couple months I have been coding my own open source temperature control program for the Arduino MEGA 2560. I call it notorious PID. It incorporates a 20×4 character LCD for display, a rotary encoder with pushbutton for user input, Dallas OneWire DS18B20 temperature sensors, and a unique control algorithm inspired largely by the work of Elco Jacobs on UberFridge and brewPI. It also has data logging capabilities and supports end-user made CSV temperature programs (lists of steps: run at X temp for Y duration) via an SD card slot. This makes it possible to create custom temperature profiles for different fermentations that include things like temperature ramping, diacetyl rests and cold crashing. For a more complete description, check the README at my GitHub repository.
I’ve written a couple libraries that may be of use to other Arduino coders out there. The dallas temperature library was creating a huge problem for the speed of my code with its hard coded delay so I’ve written my own wrapper class for DS18B20 OneWire temperature sensors. I’ve also written some versatile templated functions to add EEPROM read/write functionality to my project.
Most of my work the last couple weeks has been focused on tweaking the control algorithms and determining various tuning parameters (unique to each chamber/fridge/freezer)….
q
notorious PID source via GitHub
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
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, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, 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.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Python for Microcontrollers — Python on Microcontrollers Newsletter: Pi Day, GitHub 2FA and much more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi