Got my arduino spot welder earlier this week(https://malectrics.eu/product/diy-arduino-battery-spot-welder-prebuilt-kit-v3/). It was working amazing for 100 welds. Then I heard a pop, and saw a flash from the arduino unit. Every time I would place the probes on the nickel strip(or anything that creates continuity) I would get smoke from the unit.
I immediately disconnected everything. After some inspection I saw this small… whatever it is on the bottom of the unit burnt. I think it’s a diode, I am totally not sure. Was my 12v 100AH battery too much?
Can anyone smarter than me check out the diagram and let me know a suitable replacement for whatever it is I burned. Iv’e looked at the diagram(https://cdn.instructables.com/ORIG/FVN/JRZ1/J70QPQB7/FVNJRZ1J70QPQB7.pdf) but it’s just not clear exactly what it is. I’m 99 percent sure its a diode just because of the placement and where it’s located.