stm32 heating stage 1.0

update record

The basic functions of source code v0.9 are completed. 

The source code v1.0 has optimized the interface. The optimized interface is as follows:        

I haven’t measured the maximum temperature. I usually adjust it to 2220 degrees, and it will heat up in about 1 minute. The temperature is basically sufficient.  

The required modules are as follows:

1. stm32f103c6t6 minimum system board   

About 13 yuan

2. dc-dc step-down power supply module, input supports 30v, output 5v 

About 3~5 yuan

3. max6675 k type thermocouple module

About 15 yuan

4. Rotary encoder module 

About 3 yuan 

5. pwm switch module 

This is what I originally bought

The price is 1.7 yuan. Although the rated power is 400w, it is easy to burn out when the current is high, so the pwm module is made of perforated board and welded by myself.

Refer to the schematic diagram given below for the circuit diagram, and you can solder one yourself. You can also use the PCB provided below to build the board, but that PCB has not been tested, so use it with caution.  

6. 0.96-inch i2c interface (four-pin) OLED screen

About 15 yuan.

7. 10 * 7 aluminum-based heating plate.

The board of this project used directly https://oshwhub.com/GeekStartzhan-shuo/GSH_Bed-lv-ji-ban-jia-re-ping-tai

In order to prevent the author from removing the project, put the 10*7 PCB into the design drawing below. You can directly use this PCB drawing to create the board in Lichuang.

8. Shell

If you have a 3D printer, you can print it by yourself according to the size. If you don't have one, you can buy a waterproof box like that at a certain price, and the price is also very cheap.   

Wiring table:

1. Encoder<=>stm32 minimum board

2. oled<=>stm32 minimum board

3. max6675<=>stm32 minimum board

4. pwm module

Refer to the schematic diagram given below for wiring.

The power supply is 20~24v, about 120w.