Week #17 - May 16th to May 22nd - Powering the CAN HMI

This week I focused on how we were going to power the CAN HMI with both DC power and a battery. I found two key components on Amazon to help complete this task, and ordered them. The power switch takes two inputs, onboard and back up battery. It prioritizes the onboard and automatically switches to back up when it no longer gets power from the onboard. The output voltage from that is them connected to a buck converter that takes takes the voltage down to 5V 3A for the Rpi to run. I spent some time testing this configuration with a back up battery I had. I found that that the power switch I brought only accepts a minimum of 12V for the onboard, so I have another on coming that take anywhere between 5V-32V and will use the onboard power to charge the battery as it is running. If that works we will be able to build in the battery and change it and run it solely off the serial port.