System Overview; Introduction - Raspberry Pi PiCoolFAN4 User Manual

PiCoolFAN4

System Overview

Introduction

The PiCoolFAN4 is an Advanced Active Cooling System designed for the Raspberry Pi 4 as an independent
and autonomous cooling system, and can be used with all models of Raspberry Pi.
The PiCoolFAN4 provides an enhanced cooling capability using an embedded fan and temperature sensor.
The PiCoolFAN4 temperature sensor is placed exactly 3.5 mm above the Raspberry Pi 4 CPU. This
guarantees accuracy and continuity, measuring the system temperature as close to the CPU environment
as possible.
The PiCoolFAN4 does not need any software installation (great for software such as KODI, which can also
make use of the IR interface) and requires simple assembly by the user. If required, users can make use of
the provided software to enable greater control of the fan and cooling profile – including noise reduction.
The provided software allows the user to select either the Raspberry Pi's CPU temperature for fan
threshold control, or the included temperature sensor on the PiCoolFAN4 PCB. In addition to this, the
software also allows the user to select and edit different cooling profiles which allow either instant fan
changes ('hard' cooling) or gradual changes in speed in-line with temperature changes ('mild' cooling).
The PiCoolFAN4 does not use any GPIO pins - all communication with the Raspberry Pi is via I
leaves your GPIO pins free for your projects or other HATs, which can be stacked with the PiCoolFAN4.
The PiCoolFAN4 is compatible with heatsinks when using an additional 8mm header. This allows users to
benefit from both passive and active cooling at the same time.
Noise reduction is achieved through the use of a PWM fan. This allows the user to set the fan speed
depending of the temperature, dramatically decreasing noise generation to an absolute minimum.
The PiCoolFAN4 includes Air Circulation Technology – the fan forces cool air over the CPU, removes heat,
then the warm air escapes through the special circle openings on the PCB. This design guarantees proper
air circulation and maximizes the cooling efficiency even with low fan speeds (low noise).
The PiCoolFAN4 is standard equipped with:
•
Battery Backed Hardware Real-time Clock (RTC) DS1307 (coin battery 1220 available separately)
•
2 user programmable LEDs (Red and Green)
•
3 System LEDs (Cold, Hot and fan running)
•
ESD Protected 1-wire interface (5V/3V)
•
Infra-Red Receiver interface (Infra-red receiver available separately)
The PiCoolFAN4 also includes mounting areas for the following features:
•
High Current Relay Kit (available separately)
•
Programmable sounder (available separately)
Designed by www.pimodules.com
Firmware Code 0x14
manufactured in co-operation with
Print Date 10.11.2019
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