Controlling Coreless motor using mosfet

Projects General Guidance
41

at 255 - 7.4 volts
at 128 - 3.7 volts
I`m using a multimeter ( UT33D+)

42

yeah I thought so too but then it wouldnt have worked properly with the geared motor, which it does.

43

I did, same thing

44

Unless your DMM/multimeter has a setting for PWM, the voltage you read will always be wrong.

The voltage across the motor will always be less than the supply voltage unless the motor is stalled.

You should not run a 3.7V motor with a 7.4V supply

45

Try running it by arduino's 5v

46

I tried connecting an external 5v supply, at 255 it gives 0.84 volts :frowning:

47

I tried connecting an external 5v supply, at 255 it gives 0.84 volts :frowning:

Thats normal
See post #44

48

yes, but it`s really slow.

49

Maybe the motor is bad or you damaged it by connecting it to a high voltage

50

just tried another one, it works the same

51

Mosfet can also be bad check it
If you have more mosfets then check with them

52

And try to see wether Your arduino uno is damaged
try by running a simple code on your arduino

53

I tried the irf44zn and another uno. I`m so confused right now

54

I mean arduino in the first line

  • I would like to Know your arduino model
55

arduino uno r3

56

Is it IRFZ44N OR IRF44N?

57

Does it run at the rated speed if you connect a 3.7V battery directly to the motor?

58

irfz44n

59

Same here!!

60

no, it`s really slow