I've never assembled or used one of these pocket spot-welders before. They seem easy enough to use, so I purchased the parts kit. Whatever I learn, I will post here in order to speed the process for others.
This is a "low voltage / high amp-current" spot-welder. The power source is either a large 12V car battery, or an old LiPo battery pack, assembled to 3S, or a bank of large audio capacitors which are topped-off by a small power supply, I have even seen a 12V battery coupled with large capacitors. This device will eventually cost roughly $100 in parts, and will provide:
1) dual pulse, with adjustable timing for either pulse (first pulse burns off oxidation, second pulse is longer and performs the actual welding)
2) triggered by a foot-switch, so hands are free (not included)
3) can hold up to 8 FETs, so very high currents can be used without overheating the device (original design used 6 FETs)
Here is the information thread on these and where to buy the parts kit
https://endless-sphere.com/forums/viewtopic.php?f=31&t=81274
This is a "low voltage / high amp-current" spot-welder. The power source is either a large 12V car battery, or an old LiPo battery pack, assembled to 3S, or a bank of large audio capacitors which are topped-off by a small power supply, I have even seen a 12V battery coupled with large capacitors. This device will eventually cost roughly $100 in parts, and will provide:
1) dual pulse, with adjustable timing for either pulse (first pulse burns off oxidation, second pulse is longer and performs the actual welding)
2) triggered by a foot-switch, so hands are free (not included)
3) can hold up to 8 FETs, so very high currents can be used without overheating the device (original design used 6 FETs)
Here is the information thread on these and where to buy the parts kit
https://endless-sphere.com/forums/viewtopic.php?f=31&t=81274
