in 27th april, i use my arduino and it works fine. but now i think somethings wrong with my nano. there is some little heat in my nano chip, but my usb socket getting much more hotter. i tried to plug in and play blink code, and after ~4 minutes my nano still can play blink code. is it normal?
and if i see using voltmeter, my 3.3v nano pin just give me 0.8v. if i plug into led, my led doesn't light up. and i don't know when this pin broken because in 27th april i doesn't use this pin
These things don't just go bad sitting on a shelf.
after checking, there is like regulator getting more hotter than my usb socket, im sure because of this my socket getting hot, but is my 3.3v regulator broken?
Can you decribe the project that you were working on? Components / modules etc. How was it powered at that time? Is this a classic Nano or one of the newer ones?
A schematic involving all the wiring (including power and GND) of the project will be useful to determine what might have happened.
No.
One way to find out; desolder it ![]()
just gived 10k resistor between gate mosfet and source mosfet, gate mosfet to d11 arduino, source mosfet to +12v adapter, drain to dc motor, and one of dc motor pin plugged to ground. ground adapter to gnd arduino.
this irfz44n pinout
this photo is my reference how to connect arduino to irfz44n
You seem to be missing a resistor between the Arduino and the gate. See schematic here: https://www.gammon.com.au/motors ; you can omit the diode.
As far as I understand it, fets draw a lot of current on the gate while they are in the process of switching on; the additional resistor will limit the current. The missing resistor could result in the cause the 328P being damaged as well..
ok, thank you for this one, because after i check every pin on my arduino, pin 13 and every analog pin broken if i use analogWrite command, and maybe my 5v and vin pin also broken because it just give 4.8v, as i know 5v and vin pin give like 4.99v or 4.98v
wait, if i see here, the pwm pin connect to 150R, and then connect to 10K and irfz44n
the full image for this one

but in here 5v pin was connect to 10K and 150R, is it still work if i use like this image above? or i still use it like this?
Both will work as far as I know. You will have to do some research on the forum or on google, I have seen discussions about which one is supposed to be better.
That's backward for an N- channel MOSFET.
+12V to motor +, motor - to drain, source to 12V ground.
IRFZ44N is not a logic level MOSFET, 5V is not enough to drive it to full conductance.
sorry i forgot it was n-channel while typing this one. but im sure i do like you said while prototyping
First, why is not logic level mosfet?
Second, why 5v is not enough to drive it to full conductance?
im really confused because in this datasheet say to full conductance between drain and source just need 3v, but in youtube i saw it can full conductance using 5v
datasheet
Are you powering the lamp from the Arduino, if so that is why it is hot.
What is the purpose of the light bulb? What is it's voltage and wattage? How is it connected in the circuit? One source of heat could be powering the Nano with 12V through the VIN pin and 5V regulator, Are you sure it's not the 5V regulator that's getting hot? Where do the 2 yellow wires at upper right go?
First of all, im try to turn on dc motor using irfz44n, im not try to turn on any lamp
This one is just for my reference how to connect irfz44n to arduino
Why not remove the unused bulb so we can see how the red and 2 black wires are connected?
200mA in idle load
I use central lock car dc motor
Is the motor always in idle? If not what is the Amps when under load?




