super_star

DIY high current spot welding machine

Overview

Change log

4/15: Pit opening and project establishment

4/16: Basic function code is written.

4/17: Schematic design completed

4/18: PCB design begins

4/20: Wiring completed

4/21: Optimized Yixiaxia

TODO: Modify to balanced charging... (otherwise one voltage will be low and the other will explode)

Function introduction

Using Arduino Pro Mini as the main control, it has strong playability
Control board/mos board split design for easy maintenance/modification
0.96-inch OLED screen, all parameters displayed on one screen
Safe and fast charging capacitor, automatic stop when full
High gate drive voltage ensures low internal resistance
Foot pedal/automatic spot welding switch at will

(Because the OLED blocks the pad, we only solder one way) Welding video (Bilibili)

My post on Digital Home

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-03 23:18:15

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