ZP-0110

Armor lite heatsink with pwm fan for Raspberry Pi 4B

• Purchase URL [ https://52pi.com/products/52pi-cnc-extreme-heatsink-with-pwm-fan-for-raspberry-pi-4 ]

Description

This is a thin and lightweight heat sink, equipped with a 3510 ultra-quiet cooling fan, and the fan supports PWM speed regulation, which is perfectly compatible with Raspberry Pi OS. Other systems need to manually write python or C code to drive the fan speed through PWM.
NOTE: Supports Raspberry Pi 4B Only, Automatic speed control function only supports Raspberry Pi OS.

Features

• Lightweight and silent
• Support PWM control speed regulation
• Compatible with official system configuration
• Easy to install and fix
• Good heat dissipation effect

Gallery

• Product Outlook

• Specifications

Package Includes

• 1 x Armor lite heatsink with pwm fan for Raspberry Pi 4B
• 1 x Screw driver
• 2 x M2.5x6mm Screws
• 4 x Thermal Pad
• 1 x Instructions

How to assemble

How to enable auto adjustable fan

• Turn on Raspberry Pi and login.
• Open a terminal and typing:

sudo raspi-config

• Navigate to 4 Performance Options -> P4 Fan and select YES-> Input or keep it as 14->OK->input temperature in degrees should the fan turn on, for example: I'd like turn on the fan when the temperature reached to 65 degrees, input 65 and press Enter.

How to enable it via Programming

• Make sure RPi.GPIO library has been installed.

  pip freeze |grep RPi.GPIO 

If feedback is:

RPi.GPIO==0.7.0

means library is OK.

• Open a terminal and create a file named: pwm-fan-control.py
• Copy and paste following code into the file and save it.

import RPi.GPIO as GPIO
import time
import subprocess

GPIO.setmode(GPIO.BCM)
GPIO.setup(14, GPIO.OUT)
pwm = GPIO.PWM(14,100)

print("\nPress Ctrl+C to quit \n")
dc = 0
pwm.start(dc)

try:
    while True:
        temp = subprocess.getoutput("vcgencmd measure_temp|sed 's/[^0-9.]//g'")
        if round(float(temp)) >= 40:
            dc = 100
            pwm.ChangeDutyCycle(dc)
            time.sleep(0.05)
        else:
            dc = 0
            pwm.ChangeDutyCycle(dc)
            time.sleep(0.05)
except KeyboardInterrupt:
    pwm.stop()
    GPIO.cleanup()
    print("Ctrl + C pressed -- Ending program")

• Execute it by typing:

python3 pwm-fan-control.py 

• The fan will be turned on when the CPU temperature is reached to 65 degrees.

Keywords

• Armor lite heatsink with pwm fan for Raspberry Pi 4B, PWM fan, adjustable speed fan, heat sink, quiet fan