Arduino Thermostat

cults3d

For a newer and improved version on my own website, go to https://www.designuitinspiratie.nl/hot-end-thermostaat/ This DIY tool is super handy for me, so it may be just as useful for someone else online. First, connect a 100K NTC thermistor, a Heater, and a 12V-24V Power Supply. Then set the temperature you need, and this Thermostat will keep your heater at that exact temperature. I use this tool to heat up heaters like Hot End and Heat Beds from 3D printers on my workbench. It also comes in handy for drying Filament or keeping any chamber at a specific temperature. The display shows two rows: the top row displays the Thermistor Temperature, while the bottom row shows the Set Temperature. The Red LED lights up when the Heater is activated. I've designed it so that the Arduino can be powered separately from the FET and Heater part, giving me complete freedom to choose my Power Supply. The Arduino Uno measures the temperature and switches the FET for the heater. In the Photo Section, you'll find a simple schematic. If you're interested, an Arduino sketch is also included - I've written it in C, but the Fahrenheit option is still disabled. Note that I had to clip some leads on the Arduino to make it fit snugly into the front panel (which is 3D printed). Also, be aware that the Red LED isn't shown on the schematic.