DIY Antispark with switch for 15€ (open source)

Exact! And also more cost/current compared to N-ch

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Is the latest version available on JLPCB ? I know it may be not the final version, but I would like to order few pieces ( I am building 3 batteries right now) and want to integrate it there - even if I have to fix/replace it later.

Really good work ! Thanks @ludwig_bre for this and your inspirations/videos about batteries build ( mine and my friends are based on your examples)

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I will be able to share 2nd week of January

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Short update:
Finally found time to power up my new revision of boards

As you can see the design was split between the power and the logic board
Had a small bug still, that could be solved by swapping a resistor for a capacitor, so no new layout needed

Tested the logic (soft start, short circuit detction,…) at 24V and 84V succesfully
Next up: Testing the power handling capability @200-300A

2026-01-03_12h25_35

2026-01-03_12h25_51

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Amazing Ludwig.

Just to clarify, a simple reed switch (Normally open) will be suitable for this right? Seems like yes from the schematics but just want to be sure.

Yes any switch that can handle battery voltage and 10mA of current

Now that i started to think about I discovered that i have the ones that are “rated” at 30V DC. Link: https://www.aliexpress.com/item/1005005334347658.html?spm=a2g0o.order_list.order_list_main.163.4c441802t2yioq

Do you have any experience can i supply them with 60V ? Also they seem to be two versions: AC and DC and one goes up to 200V.

Would AC 200V reed switch from that link above be better than this 30V DC ?

Ah you are talking about industrial (digital) sensors
Those have their own circuit inside and will draw standby power as well as being limited to a certain voltage

I would recommend using a passive reed sensor like this:

Hmm, there is no indication of electronics inside of them, i think they are passive? How to check? Would they not require at least three wires for that?

Checking continuity with Voltmeter right now and it seems they behave as they should. I dont see an option how could they be powered if they are NO ?

Also looking at these to buy: Option 2