Abe wrote in to tell us about his open-source sous-vide kit, called Ember Kit. He writes:
This is a picture of everything you will get with the Ember Kit. The round holes in the face are double-drilled, but both will be completely covered (one by the knob, one by a sticker).
The Ember Kit is a box for controlling a heater (or cooler, or whatever) to maintain the temperature precisely. It uses a chip with the Arduino bootloader to switch the heater on/off according to a dynamic PID control algorithm. It does the switching with a solid state relay (can switch up to 10 A) and reads the temperature with a voltage divider and thermistor.
Some features of the Ember Kit:
Solid state: A solid state relay with integrated heatsink can switch up to 10 A and is built to last. No moving parts, no clicking noises.
Precision Thermistor: For the highest accuracy, we include a submersible thermistor and shielded high-temperature cable.
Arduino-based code: Easily program the controller with an FTDI cable. This means you can have the temperature follow any profile, and it can interface with the computer via USB for data logging and dynamic control.
Custom enclosure face: We’ve already cut holes in the enclosure face to fit the display and knob. You hack it onto your heating device however you want.
Adafruit has had paid day off for voting for our team for years, if you need help getting that going for your organization, let us know – we can share how and why we did this as well as the good results. Here are some resources for voting by mail, voting in person, and some NY resources for our NY based teams as well. If there are additional resources to add, please let us know – adafruit.com/vote
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.