DIY Hot Plate for SMD Soldering Using ESP32
To access the Cirkit Designer project folder follow this link (Cirkit)
The wooden case is made from 4mm plywood sheets. The file for laser cutting can be found in Drawings folder here.
- ESP32-WROOM-32UE Dev Kit (AliExpress)
- RP1A23D5 (mouser)
- 400W PTC Heating plate (I Used 2) (AliExpress)
- Adafruit 2.8" TFT LCD Shield (Adafruit)
- 5V DC Cooling Fan (I Used 2) (AliExpress)
- AC to DC (5V) PSU (AliExpress)
- MAX6675 Thermocouple Module (AliExpress)
- FAN Driving Circuit (100uF Polorized Capacitor + 1K Omh Resistor + BD139 BJT Transistor + 1N4007 Diode) Or Similar
- Passive Buzzer (AliExpress)
- Push Button (Any)
- Custom PCB to house everything. I designed one using KiCad if any one is interested drop me a message, but you can just solder the different components manually
In the images folder there is a small video demo on how to use the hot plate.
A standard reflow system consists of five phases: preheating, soaking, reflowing, dwelling, and cooling.
IMHO, PID control is required for a successful build of a reflow "system".
More details on the importance of PID can be found here