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I'm looking to make the setup as compact as possible and enclose the board & battery in a small box (maybe 3d printed). So I'm thinking about not using a foot switch and attaching a small switch box to the negative probe side. I'd run it's wire back along the high current lines (old battery jumper cable wires) to the PC board in shielded cable. Do you think I'd have a problem with some kind of induced spike into the switch wires and fry the Arduino? Or, since the line to the switch would run along both the + and - high current lines, would they cancel out?Thanks. This is really a fantastic tool.
Wow! I've wanted to get a battery spot welder for a long time now but didn't want to spend that much money. I built your spot welder (the original version, before your latest update) and WOW! Works great. Just what I needed. I'm using an old 12V lawn tractor battery that wouldn't start the engine any more and it seems to have plenty of power. Question: Could a 9V battery be used in place of the secondary 12V supply? I think it would be fine for the Arduino, but don't know if it would run the MOSFET drivers (8 of them in the original version).Thanks for a great project.
Internet of Things Class
3D Design Class
Circuit Board Design Class
PCB Concepts and Materials
Assembling the Board
Laying Out the Board
3d Printed Gearbox for Small Dc Motors
Tools and Supplies
Raspberry Pi Class
Chimera: $60 DLP High-Res 3D Printer
Excellent project and great instructions.I'm a little confused about the actual resin printing process. How much resin needs to be above the platform? Does only the top surface of the resin harden - maybe the UV doesn't penetrate very far? If that's true, then is it really just a matter of being sure the platform is close enough to the first cured layer so it sticks? And do I understand correctly (probably not) that each time a layer is printed the platform submerges to get a little fresh resin, then rises back up except not quite as far as it went down (difference being the layer height)?Dumb question: Is top-down printing - looks like the bottom layer gets printed first. Thanks, really a great project and explanation.