Arduino Thermostat

thingiverse

For a brand new and even better version on my own website, go to https://www.designuitinspiratie.nl/hot-end-thermostaat/\r\n\r\n\r\n\r\nI think this is an incredibly useful tool so it might be really handy for someone else on the Internet :-)\r\n\r\nConnect a 100K NTC, a Heater and 12V-24V Power Supply. Then set the Temperature you need and this Thermostat will keep your heater at the set temperature. \r\n\r\nThis is a DIY tool I use to heat up heaters such as Hot End and Heat Beds from 3d printers.\r\nThis way I can work on them on the bench. It also comes in handy with drying Filament or keeping any chamber at a specific temperature. The Top row in the display shows the Thermistor Temperature. The bottom row shows the Set Temperature. The Red LED Burns when the Heater is activated. The Arduino is powered separate from the FET and Heater part so I have free choice in Power Supplies. The Arduino can be powered from the front through USB or wall adapter or via the back connector.\r\n\r\nIt is built in the housing of an old DVD Burner (meant for PC cases)\r\nThe basis is an Arduino Uno that measures the temperature and switches the FET for the heater. In the Photo Section I included a super simple schematic. Also for who is interested a Arduino sketch is included. I have set mine in C but the Fahrenheit option is still (disabled) in the sketch.\r\n\r\nNote: I had to clip some leads of the Arduino short to make it slot into the (3d printed ) front.\r\n\r\nNote2: The Red LED is not shown on the schematic\r\n\r\nNote3: I used an Optocoupler but it also works without. You can skip it and just connect the gate of the FET (through a resistor) directly to the Arduino. But I think that people who are interested in this will know:-)\r\n\r\nOtherwise feel free to ask :-)