DIY Spot Welder made with an Arduino and a Microwave transformer.

Currently under construction.

Parts Include:

• Microwave transformer
  • secondary rewound with single turn 70mm^2 stranded copper, coated with heatshrink.
• ArduinoProMini
• OLED Display
• Potentiometer
• Pushbutton
• Green and red LEDs
• 220 Ohm resistor x3
• Wires and heatshrink
  • For Mains voltage and DC circuitry
• 50mm x 70mm perfboard
• 5VDC 850mA switch mode USB power supply
• Solid state relay
  • 40 Ampere 24-380VAC (3-30VDC input)
• Powercord, powerswitch, and enclosure

Some code my own @intentionalrobots Woodrow Wiest - https://www.instagram.com/intentionalrobots/ git - https://github.com/woodrowwiest/HotTips-3000 arduino - https://create.arduino.cc/projecthub/woodrowwiest/hottips-3000-94f4a8/embed?use_route=project

Much inspiration gleaned from:

Masomtob, Manop & Sukondhasingha, Rawitat & Becker, Jan & Sauer, Dirk. (2017). Parametric Study of Spot Welding between Li- ion Battery Cells and Sheet Metal Connectors. Engineering Journal. 21. 457-473. 10.4186/ej.2017.21.7.457. https://www.researchgate.net/publication/322394238_Parametric_Study_of_Spot_Welding_between_Li-ion_Battery_Cells_and_Sheet_Metal_Connectors

Spot Welder Timer Example Check out the instructable here - http://www.instructables.com/id/DIY-Spot-Welder-From-Microwave/
Jack Davies, http://jackdaviesdesign.com <<< >>> http://undergroundengineering.co.uk

Would love to see if you make one!