Raspberry Pi 4 was welcomed by the Pi enthusiasts for the increased processing power. However, this came at a price. The RPi 4 can draw up to 3 Amps, which means it has to dissipate 15 W of power. Raspberry Pi cooling is a must. From the simplest passive heat sink, through elaborate fan blowers and even to an exotic water-cooled idea, many options are available.
The Smart Fan has the form factor of the Raspberry Pi HAT. Its own tinny 32-bit processor receives commands from Raspberry Pi through the I²C interface. A step-up power supply converts the 5 V provided by Raspberry Pi to 12 V, ensuring precise speed control. Using pulse width modulation, it powers the fan just enough to maintain a constant temperature of the Raspberry Pi processor.
The Smart Fan preserves all the GPIO pins, allowing any number of cards to be stacked on top of Raspberry Pi. If another add-on card has to dissipate power, a secondary Smart Fan can be added to the stack.
Together with multiple add-on cards, the Smart Fan can be installed on the DIN-Rail, for sturdy industrial applications.
Stack Level Jumper
Two Smart Fans can be installed on top of each Raspberry Pi. The assumption is that you have one more card in the stack which requires cooling. The bottom side of the Smart Fan has a jumper which needs to be installed on the second fan, in order for the Raspberry Pi to differentiate the two I²C addresses.
- 40 x 40 x 10 mm fan with 6 CFM airflow
- Step-up 12 V power supply for precise fan speed control
- PWM Controller modulates the fan to keep constant Pi temperature
- Draws less than 100 mA of power
- Stackable to itself, 2 fans can be added to Raspberry Pi
- Fully stackable allows adding other cards to Raspberry Pi
- Uses only I²C interface, leaves full use of all GPIO pins
- Super quiet and efficient
- Smart Han HAT
- 40 x 40 x 10 mm Fan with mounting Screws
- Mounting Hardware