PWM with 4-pin fans? - Simhub General https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/ All about SimHub! en-US Thu, 16 Jul 2026 19:40:52 +0000 wpForo 60 RE: PWM with 4-pin fans? https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3573 Fri, 29 Oct 2021 20:57:02 +0000 @admin5435 got it- thank you!

]]> Simhub General StrayTexel https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3573 RE: PWM with 4-pin fans? https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3572 Fri, 29 Oct 2021 19:38:36 +0000
  • The power source + must go directly to the fan +12v (it's not connected to the Arduino.
  • The power source gnd must go to both Arduino (to any Arduino gnd pin) and fan.

    • Do not connect the power source to the Arduino plug. It's better to keep high power away from the Arduino. Some fans can draw easily up to 3-4 amps, if you run two of them and use the Arduino power plug it means running 6amps through the Arduino, it's above its capacity and it would easily fry.

    ]]>     Simhub General Wotever https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3572     RE: PWM with 4-pin fans? https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3570 Fri, 29 Oct 2021 18:57:55 +0000 @admin5435 hi Wotever! Thanks for replying... that somewhat makes sense, but I think where I get lost is this part: 

    • Plug 12 V to a 12v power source

    Do I buy a power supply like this (Amazon.com: Chanzon UL Listed 12V 2A 24W AC DC Switching Power Supply Adapter (Input 100-240V, Output 12 Volt 2 Amp) Wall Wart Transformer Charger for DC12V CCTV Camera LED Strip Light (6Ft Cord, 24 Watt Max) : Electronics) and plug it into the Arduino, and then somehow connect both fans' DC pin to some pin on the Uno PCB? Or do I need to connect the fan DC pins directly to the power supply (skipping the Uno altogether, and only connecting PWM and GND)?

    ]]>     Simhub General StrayTexel https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3570     RE: PWM with 4-pin fans? https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3569 Fri, 29 Oct 2021 16:21:46 +0000 Hi ! With pwm fans you don't need any additionnal board ;) : https://github.com/SHWotever/SimHub/wiki/Arduino-Shake-It#pwm-fans

    ]]>     Simhub General Wotever https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3569     PWM with 4-pin fans? https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3568 Fri, 29 Oct 2021 16:14:22 +0000 Hi, 

    I'm in the process of building a SimHub Shake-it fan setup. I currently have an Arduino Uno R3, and 2x 140mm NF-A14 iPPC-3000 fans. These are 4-pin PWM fans. I can't seem to find any guides that are using fans like these- most seem to be 2-pin DC fans.

    FWIW, I'm currently planning to buy this motor shield: Amazon.com: HiLetgo TB6612 Mosfet for Arduino Motor Shield Standard IIC I2C TB6612FNG Stepper Motor PCA9685 PWM Servo Driver Shield V2 Robot PWM Uno Mega R3 Replace L293D : Industrial & Scientific

    How exactly would I hook these fans up to the motor shield? Can someone please help clear-up my confusion here? :)

    Thanks in advance!

    ]]>     Simhub General StrayTexel https://www.simhubdash.com/community-2/simhub-support/pwm-with-4-pin-fans/#post-3568