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Vedder Anti-Spark broken / Switch without Function?


#1

Got my Vedder Anti-Spark today and wanted to test it without plugging an esc on.

So i just connected a 20 V Power Supply to the IN-Connectors of the AS and my multimeter to the OUT-Connetors and measured exactly the 20V there. Fine.

But: The voltage is at the OUT-Connectors regardless if the Switch of the Anti-Spark is set to on or off?! Does anyone have an explanation for this behavior?


#2

Maybe you can provide some pictures of your Vedder Anti-Spark switch. Without pictures there could be endless possibilites for the failure…


#3

you might have gotten one with the bad mosfet batch.


#4

Your fet could be damaged, it’s one of their characteristics to be always switched on if they are (damaged^^).


#5

I now put everything together and the switch works fine. Maybe the behavior i talked about in post 1 is normal when no ESC and motor is plugged in.


#6

No it isn’t.
~edit~ indeed it is!


#7

Hm kay. But why does it work anyway when everything is put together?


#8

Is it possible your multimeter closed the circuit?
So the 20V bypassed your switch, by flowing through the multimeter ?


#9

I remember something similar happend to me when i built this circuit. If i switched it of and measured voltage it was still high. But if i connect any kind of load (voltmeter already was enough) voltage drops slowly (depends on the load) to zero. Now with a esc connected there is a small load.
I assume its because the cap in the circuit must be discharged before it turns the mosfet off.


#10

Sounds reasonable. So no need to return the AS. I’ll test it with a LED or something else when i’m back in the workshop.


#11

Take a resistor, or do you have ‘‘e-skate rated voltage’’ LED’s?^^


#12

Of course :slight_smile: Got a 12V power supply and a 470 ohms resistor. No need to use the skate voltages, i just want to confirm the theory with the cap that has to unload first.