There is a software update V3.3.2 available. It is compatible with all V3 DIY Arduino Battery Spot Welder versions.
There is a new Version 3.1 of the Spot Welder available. It has a little improvement on the mosfet board that makes it possible to use higher CCA car batteries -> more welding current. Read more to find out the details.
The case for the Arduino Spot Welder got a design update so it is now more modular to use.
There is a bug that the Auto_Pulse feature will not work correctly when using the Spot Welder with the Diode Set. Read more how to easily avoid it when building the Spot Welder yourself.