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Smart temperature control for a cheap Soldering iron
a year ago, March 29, 2023
Reading time: 1 mins
I recently bought a less than 5 Euros cheap Soldering Iron which I decided to make smart by adding a control circuit to it.
The project requires the following components
- Soldering Iron
- Thermistor 10k PTC
- OLED screen
- Any microcontroller (I used esp32-s2 / Wemos S2 mini dev board)
- Solid State Relay (SSR)
- Resistors
The project had 3 main stages
- Getting the thermistor ready to read the temperature
- Getting an OLED screen to display the temperature
- Driving relay to control temperature.
Budget
The total cost for the project was
- Soldering Iron – 3.5 Euro
- Thermistor 10k PTC – 1 Euro
- OLED screen – 3.5 Euro
- esp32-s2 / Wemos S2 mini dev board – 4 Euro
- Solid State Relay (SSR) – 1.5 Euro
- Resistors and other components – /
The total budget came to 13.5 Euros, which is cheap. 😉
![](https://res.cloudinary.com/anilmaharjan-com-np/image/upload/v1680087351/Blog/Screenshot_2023-03-29_at_12.55.42.png)