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General • Re: Problem with IRLZ44n mosfet in a circuit

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Hello again. After replacing the IRLZ44n with irlml2502 (it was pretty small but I made it work somehow) pretty much the same thing happens. voltages compared to ground:
drain: around 3v
source: around 8.8v
gate: around 3.28v

After a lot of testing and even some successful atempts of burning the steel wool through my setup, I think that this happens because of the combinations of multiple factors, mostly with how I set everything up.

1stly I was using thin jumper cables which are prone to cold joints (as someone mentioned already) Also these cables are not suitable for high currents and their internal resistance can rise with temperature which probably led to less voltage through the steel wool.

2ndly the batteries depleted and I had less voltage to work with in the end. High current spikes also caused the raspberry pi to shutdown because the battery could not provide enough current for raspberry pi and steel wool simultaneously (this happened mostly when the battery was almost depleted)

3rdly the method with how I connected the steel wool was not great, since i just stuck the jumper cable ends in the steel wool sometimes this led to the current not even be able to go through because jumper cable ends don't have much surface area to go off.

To summarize it was quite messy with how implemented the circuit. Are there better ways to implement multipple components like this apart from using a bread board? I would like to hear your suggestions!
Thank you everyone for your help, it was a great learning experience! :D

Statistics: Posted by H3LL_0U — Fri Jan 24, 2025 11:01 pm



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