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Aimtrak solenoid clicks soon as power is applied
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meltman:
Hey everyone - I'm struggling with a bizarre issue. As soon as 36v is applied to the gun the solenoid clicks closed and will try to stay there.

At first I thought the Mosfet was to blame - it seemed to measure bad. I replaced it but the symptoms persist. I plug it in (power only, not usb) and instantly the solenoid closes on.

Any ideas? This circuit is not especially complicated. I dont understand what is activating the fet. Does the USB board need to be attached? Maybe I need a pulldown or something? I thought that is what the resistor on that board was doing.
Titchgamer:
I had this problem twice, Originally thought the polarity was wrong but after confirming that was ok it left me and Andy stumped.

Afraid I never fixed it and now just play without the recoil but if you ever find a solution please let me know!!
meltman:
I have two guns now that both suddenly exhibit the behavior. I’m playing without recoil now as well.
Mike A:
Return them.
meltman:
Mike, you are a troll sometimes.
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