This is the new V3.1 PCB Set.
Improvements in the V3.1:
- possibility to solder 4 SMD TVS diodes in parallell on the Mosfet PCB
- enough space to solder 4 through hole TVS diodes instead of SMD diodes if no SMD diodes available
- with 4 diodes installed possible to use with car batteries up to 800CCA
Improvements in the V3:
- Mosfet PCB now with 2oz copper layer and wider traces which connect the high current carrying mosfet legs to the u-shaped aluminum part
- “AutoPulse” feature, which automatically activates a pulse after a defined delay time when both welding tips touch the nickel strip (thanks to Petr Zverina for the idea)
- 7 segment display replaced by OLED display
- potentiometer replaced by rotary encoder
- Menu system to easy adjust the low battery alarm, AutoPulse delay and short pulse time
- powered directly by car battery, no more need for extra power supply
- TVS diode integrated on the mosfet pcb, no external diodes necessary
- upgraded Mosfets to IRFB7430 (they can handle up to 1000A welding current with no problem)
- Standby feature: after 5 minutes of inactivity the Spot Welder will go to standby and the foot switch and AutoPulse will be deactivated while in standby.
- u-shaped aluminum parts is now riveted to the pcb
What you get:
- The two PCBs needed to build your own spot welder
- 8 M3 nylon washers
This is the pcb only set. No other components included.