The ClusterCTRL Stack (controller and passive backplane) is a simple way to both power and control cooling for a stack of 5 Raspberry Pi. Controller Powered by 12-24V PSU. 20 pin header for Power (2…Read More…
The ClusterCTRL Stack (controller and passive backplane) is a simple way to both power and control cooling for a stack of 5 Raspberry Pi.
As supplied the Controller can be used standalone - once power is applied to the ClusterCTRL Stack each Raspberry Pi will be powered on in 1 second intervals. The GPIO (BCM18) pin from each Raspberry Pi is monitored, when this is set high the corresponding FAN is turned on (P1/P2 = FAN1 and P3/P4/P5 = FAN2) as required to cool the Pi.
You can use any software on the Raspberry Pi nodes (Raspbian/Ubuntu/etc.). To control the nodes you will need to install the clusterctrl software. Currently this needs to be manually installed - see the FAQ entry for manual installation steps.
To enable the fans to be turned on/off automatically when a Raspberry Pi requires cooling add the following to /boot/config.txt on each Raspberry Pi (in the example below it will turn the FAN on at 75C and off at 65C).
Connecting the ClusterCTRL Controller (via the Micro USB connector) you can use our "clusterctrl" tool which allows you to.
We recommend using two 70mm fans for cooling, one for the ClusterCTRL Stack Controller+P1+P2 (FAN1) and the other for P3/P4/P5 (FAN2).
What comes with the ClusterCTRL Stack
What do I need to use the ClusterCTRL Stack?
When choosing a power supply for the Stack searching for laptop/monitor power supplies with an output of 12/19 Volts and more than 60 Watts of power should help (ensuring they're 5.5mm jack with 2.1/2.5mm pin).
Due to the backplane being a fixed size you can only add an additional board under the last Pi.
STL files for the 3D printed case are available on Pinshape .
The following acrylic "frame" case can be added as an option.
The 170 mm width works with the supplied hardware (12mm / Pi / 25 mm / Pi / 25 mm / Pi / 25 mm / Pi / 25 mm / Pi / 25 mm / Controller / 25 mm).
When using the frame with a board under the last Pi you would need a wider fan tray. If you need something custom, similar to the one in the photo with the M.2 waveshare under the last Pi or a double stack please contact me before ordering.
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Olivier | Jan. 15, 2021
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