I bought a device like this but much cheaper https://www.ebay.co.uk/itm/203294502480?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&toolid=10050&campid=5338358731&customid=16284659436062937826512011000008005
I didn't have the supply needed but a friend offered a 12V 18A supply but said it not enough volts so instead gave him the welder as I had no batteries to weld.
Anyway after telling him that if the input voltage drops below 12V then it blows the fets..... and he blew the fets, well one.
All these "spot welders" are is a display and a pulse out selector using up/down buttons.
a 20ms pulse is from you tube videos a good weld when the device works.
Easy to make one with a nano and display just need a big fet to out the pulse.
My friend says he has a pack of capacitors charged through a high watt resistor to give the pulse.
Anyone played with this idea?
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I bought a device like this but much cheaper https://www.ebay.co.uk/itm/203294502480?var=0&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&toolid=10050&campid=5338358731&customid=16284659436062937826512011000008005
I didn't have the supply needed but a friend offered a 12V 18A supply but said it not enough volts so instead gave him the welder as I had no batteries to weld.
Anyway after telling him that if the input voltage drops below 12V then it blows the fets..... and he blew the fets, well one.
All these "spot welders" are is a display and a pulse out selector using up/down buttons.
a 20ms pulse is from you tube videos a good weld when the device works.
Easy to make one with a nano and display just need a big fet to out the pulse.
My friend says he has a pack of capacitors charged through a high watt resistor to give the pulse.
Anyone played with this idea?