DIY spot welders incessantly use high-powered elements that may be a bit of horrifying, given the potential of bad malfunctions. [Wojciech “Adalbert” J.] designed his capacitive discharge spot welder to be secure, simple to construct, and forego the microcontroller.
Many initiatives paintings nice with only a unmarried Li-ion mobile, but if you want extra energy, you’ve were given to begin connecting extra cells in combination right into a battery. [Wojciech]’s spot welder is designed to be simply tough sufficient to weld nickel tabs onto a mobile with none overkill. The capacitor financial institution makes use of nineteen Nichicon UBY 7500uF/35V capacitors, all stressed out in parallel the usage of solder wick saturated with solder. They sit down atop on a perfboard with metallicized holes to hold the excessive present.
[Wojciech] has detailed each step of creating the welder, together with adjustments to the off-the-shelf relay board and including a potentiometer to the step-up converter board. The extent of element makes this look like a just right beginning position in the event you’re hoping to hop into the arena of DIY spot welders. Secure is at all times a relative time period when coping with excessive powered units, so watch out in the event you do strive this construct!
DIY spot welders have graced those virtual pages time and again, together with this one constructed with protection in thoughts, and this different one who used to be decidedly no longer.
