Endless Sphere

Interesting stuff regarding pacemakers, never thought about that! But yeah, don't get that close to welder cables.


I don't think I have any extra PCB's, I will try to check tomorrow but I doubt it.

I don't think it makes a lot of difference, but I am not sure.

Also one more thing, you have leads connected to mosfets coming from the same side, this is bad for current balance, and could burn mosfets. I would suggest that you connect them to opposite sides.

I see you have both electrodes attached to same piece of wood, I would recommend against this approach because it's unlikely you will have the equal pressure on both of them.

Riba - Apologies, I've found that the function Get_ADC_Sample is included in the mikroC PRO libraries. I'm new to using mikroC PRO so I didn't know they had these libraries. I find that when you open the .mcppi file in mikro C PRO it refers to a source document called sw_pot.c but reports it as mis...

Riba - The souce code is missing the routines for obtaining the reading from the ADC. The mcppi file is also missing all the source code so you can't get it from there. Could you upload the code? That's weird, I have the ADC part of the code in it. I have just copied that part from some other sourc...

Well, this was hard to watch:


[youtube]aHNmVV7THBs[/youtube]

If you can't find the polymer version, standard electrolytic will do.

Can anyone explain what specific mosfet leads the TVS gets attached to Gate, Drain, Source? In response to this: "Another TVS diode goes across the FET legs to catch what the other diode misses". Thank you Steve Drain and source definitely :) Gate is just for mosfet control, no real power...

spinningmagnets wrote: ↑

Oct 26 2019 4:12am

I'm sure anyone here can order the welder electrodes from kWeld and try them on a JP welder. I am certain they would work fine.

Yep, that's correct

Sure, it will work.

Thanks man, this is really useful!

krlenjuska wrote: ↑

Oct 14 2019 10:36am

riba2233 wrote: ↑

Oct 12 2019 10:46am

You can use anything from 0.25 w above.

Can i use some other similar mosfets? Cant find 1324 at my local stores.

EDIT: never mind i managed to find it.

You can use those or better (watch for max voltage, IR, and gate charge).

You can use anything from 0.25 w above.

I ordered PCBs and all components - will try to make this :) Great to hear, please post your progress and pictures here 8) Most difficult thing to do for me is to program pic controller - never tried this :) It's simple once you have a programmer like pickit 2 or 3 with their own software, just con...

krlenjuska wrote: ↑

Oct 10 2019 12:54pm

I ordered PCBs and all components - will try to make this

Great to hear, please post your progress and pictures here

Thanks for reuploading, the more sources the better

Thanks, I hope this will be helpful to someone.

I'm not taking donations.

Thanks, I am very happy with the design and I hope others will like it also. I have great plans for the future

Hi guys, just wanted to let you know that I have open sourced the welder design:

viewtopic.php?f=14&t=102681

So this thread can be closed

Hi, I have decided to open source everything related to my spot welder. It is a simple, reliable, and easy to repair battery powered spot welder. You can use these files for all purposes, even commercial, at your own risk. Here you can find all files needed to make this spot welder from scratch: htt...

All the welders have been sold, big thanks to all of you who have supported me in this last few years!

As a thank you to community I will give you a little surprise later

tomjasz wrote: ↑

Sep 14 2019 5:34pm

Buy two get a discount on the third?

PM me!

Only two pieces left! They are packed and ready to ship immediately after receiving payment!

Thank you for kind words guys, the whole idea behind the welder was that is simple, robust and reliable. Enjoyed reading this form. You all saved me from taking my chances on a used Sunkko 788+ welder. I'm interested in buying one. Looks like the JP KIT versions may be all gone now. If so I will go ...

One more gone, now 5 units left, hurry up!

Ok guys, I've just sold out DIY kits, so I have only about 6 assembled units left.

Get it before it's all gone!