Microcontroller and logic field worker?

Question

Arduino

Hello,
there is an atmega connected to the FQP30N06L through 470 ohm (I don’t know why if I need 1k or more without problems I resolder) the field worker
opens no more than at the leg level of the atmega (it’s strange for some reason it has 4v when I measure log 1) of
course the diode lights up but the 12v LED strip does not have
a common ground , + (D mosfet) goes to 12v why it opens no more than 4 it is not clear
if they were pierced, I think it would either be closed or open, as I understand it
, the mosfet is generally connected to a resistor from mega to G feta, D to 12+, S to the load and to the ground in the end,
maybe I'm stupid and mixed up something (maybe the side, although according to the datasheet, so)

Answer 1

Read the theory www.twirpx.com/file/29137 . Common drain circuit - has a large current gain and no voltage gain. Similar to a common collector circuit - called an "emitter follower", in which the voltage at the base is equal to the voltage at the emitter.
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