Upgraded Wandboard Cluster

We have invested in a few more Wandboards to upgrade our mini-cluster. Since I repurposed two of the existing boards for my PCI-Express research, we now have 8 Wandboards in the cluster which makes 32 cores! A little more power for scientific applications on ARM...

Besides having more processing power available, I have made some enhancements to the power distribution board. The thin purple, pink and red wires in the background will be connected to one of the Wandboard I2C inputs to enable easy and accurate voltage, current and power measurements of the DC supply to the cluster. The excellent TI INA219 chip is used for this. It's possible to read these values from the Linux command-line so we can use a shell script to plot power values directly to a file!