An exploded diagram of the spot welder. Shown are the capacitor bank, trigger, 12 V relay, DC power input, power out, step up converter, voltmeter, industrial SCR module, and capacitor bank.

Hackaday Prize 2022: A Not-So-Smart Spot Welder

Do-it-yourself place welders typically use large-powered components that can be a bit horrifying, offered the likely for risky malfunctions. [Wojciech “Adalbert” J.] intended his capacitive discharge spot welder to be secure, quick to develop, and forego the microcontroller.

Numerous tasks work wonderful with just a single Li-ion mobile, but when you want much more ability, you have acquired to get started connecting a lot more cells with each other into a battery. [Wojciech]’s location welder is intended to be just potent more than enough to weld nickel tabs onto a mobile without any overkill. The capacitor financial institution uses nineteen Nichicon UBY 7500uF/35V capacitors, all wired in parallel applying solder wick saturated with solder. They sit atop on a perfboard with metallicized holes to have the significant current.

[Wojciech] has comprehensive every single stage of creating the welder, which include variations to the off-the-shelf relay board and including a potentiometer to the move-up converter board. The stage of detail tends to make this feel like a superior starting up place if you’re hoping to hop into the globe of Diy spot welders. Protected is usually a relative term when working with substantial driven units, so be thorough if you do endeavor this develop!

Do-it-yourself location welders have graced these electronic pages lots of instances, which include this one particular created with basic safety in thoughts, and this other a person that was decidedly not.

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