All work
SPOT WELDER
A high-current power supply on a custom PCB, with ESP32-based closed-loop current control.
Photo to come
PROBLEM
A resistance spot weld depends on the current driven through the joint, so the supply needs stable feedback and control at high current.
APPROACH
- I designed and built a high-current power supply on a custom PCB.
- An ESP32 runs the closed-loop current control.
- Hall-effect current sensing with low-pass filtering gives the loop stable feedback for weld control.
Photo to come
STACK
Hardware and software behind the project.
| Area | What I used |
|---|---|
| Power stage | High-current supply on a custom PCB |
| Control | ESP32 |
| Sensing | Hall-effect current sensor with low-pass filtering |
| Area | What I used |
|---|---|
| Firmware | Closed-loop current control |
RESULTS
- Taken from design to built hardware between January and May 2026.
Video to come