I cannot run motor below 10v with Arduino pwm

Other Hardware Motors, Mechanics, Power and CNC
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Hi, I am using the above circuit to control a 12V Peristaltic Pump. With components

  • Arduino Board
  • A momentary switch or button
  • 10k ohm resistor
  • Breadboard
  • Hook-up wire
  • 9V DC motor
  • TIP120 transistor
  • 1N4001 diode
  • 9V battery
    The only things different in the whole circuit are a pump instead of a motor and a 12V power supply instead of a 9V battery.
    My pump runs perfectly at 12V through PWM, but as soon as I reduce the voltage below 10V it stops working. I think even at 12V the speed is not what its expected to work at.
    The pump it self can work below 10 =V as I have tested it by directly attaching the 9V battery, but as soon as I add my arduino circuit pump stops working.
    Any ideas why I am facing this issue?
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What tutorial?

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And what might that circuit be????

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Sorry, just added the link in my description now

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Sorry, just added the link in my description now

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Question, @sarosh771 , lets say a 12V PWM signal at 50% duty cycle what's the V average?

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That's a bad link. Helpers don't want to accept cookies. Extract the useful information and post it here.

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God another tutorial ruined by the mysterious woke warrior Karl Söderby!

This time he has called upon the use of a TIP120 transistor, and then on the schematic he has used some sort of unspecified FET. The thing is that if you wire a transistor like the schematic there is no base resistor and the base current supplied by the Arduino pin will exceed the current that the Arduino should be asked to supply. So there should be at least a 1K resistor between the output pin of the Arduino and the base of the transistor.
Note that a TIP120 transistor will drop at least 2V, that is if you put in a 12V supply only 10V will reach the motor.

We still need to see the circuit you are attaching to the this circuit to stop it from "working".

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This is what Google says: "working for @arduino since 2018"

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