Simple and practical low-cost heating station BGA soldering station

Design requirements

In the daily DIY process, we often need to solder patches, but the price of a normal BGA soldering station is high. This design aims to achieve the most practical functions at a lower cost o(*￣▽￣*)ブ

Design analysis

1. The heating part adopts PTC heating plate. In order to facilitate the welding of 10*10 PCB board, a 120*70 400w heating plate was selected.

2. Temperature sampling uses a combination of thermocouple and max6675. max6675 comes with cold end compensation and burnout detection.

3. The microcontroller uses stc8g1k08, which has enough IO ports to meet this project, is small in size and cheap in price.

Precautions

1. This project involves 220v AC, please be sure to pay attention to safety

2. When crimping terminals, please pay attention to the tightness

3. Most components can be assembled at Uxin. The heating plate is given priority. Solid-state relays need to be purchased separately (modules can also be purchased and desoldered at Uxin).

4. Choose K type thermocouple without shell.

PCB description

PCB proofing is done five times at a time, and the excess PCB can be used as a heat-insulating bracket for the heating plate for efficient use (￣︶￣)↗

Shell description

This design offers two housing options

1. Acrylic, the cost of providing CAD drawings is five yuan q (≧▽≦q)

2.3D printing, the cost of providing 3D model is 38 yuan ($_$)

The following takes the acrylic version as an example. You need to purchase some parts.

Among them, the copper pillars require three types: m3*12, m3*12+6, and m3*20 (for the 3D printing version, m3*20 can be changed to m3*18, and the others remain the same)

The thermocouple is directly inserted into the heat collecting plate from the side gap, and the excess wire is wrapped with a heat shrink tube and stored inside the housing (note: the thermocouple housing is conductive)

Except for the bottom surface, the other five surfaces are bonded with glue (you can ask the acrylic boss for glue)