So I’ve done some measurements on amperes used in various situations on the EV3.
My main takeaway is that once you’ve done something the Brick will need more power, even though you’ve shut down or disconnected the thing that needed more power.
The unit used for my figures is mA and the multimeter I used could only go up to 200 mA so that’s why a lot of the measurements only say >200. That means the Brick was using more than 200 mA. So here are my measurements:
Booting the Brick: Varying between 100 to >200 Idle: 120 Running my Arholma app: 100-110 Running my transparency app: 100-115 Bluetooth active but not paired: 120 Bluetooth pairing/paired: 130 Bluetooth paired and running commander: 115-160 Bluetooth disconnected: 135 Bluetooth disabled: 135 Pairing computer Searching: 145 Pairing question: 145 Paired with computer: 134 Connected in labview: 138 Memory browsing: 138-140 Downloading file: 140 Shutting down: 100 Idle after reboot: 120 Wifi inserted: 145 Wifi starting: Peak >200, land at 151 Wifi connections: Peak >200, land at 154 Connecting to our wifi: Peak >200, land at 194 Connect to Brick via telnet: >200 Logged in: 197-199 Start SSH service on the Brick: >200 After shutting off wifi: 149 After unplugging the wifi dongle: 127 Idle after reboot: 125 Connected big motor: 139 Motor control app: 142 Running big motor: >200 After running big motor once: 167 After shutting down motor control app: 138 Disconnected big motor: 129 Connected touch sensor: spike 135, land at 130 Touching touch sensor without any app listening: 131 Started port view: 132 Touching in port view: 130 Exiting port view: 129 Disconnected touch sensor: 129 Connected light sensor: spike 140, land 138 Starting port view: 139-140 Exiting port view: 138 Disconnected light sensor: 129 Connected ir: spike 139, land 137 Started port view: 138 Using IR sender: 140 Exit port view: 138 Disconnect ir sensor: 129 Idle: 135 Connected small motor: spike 145, land 143 Started motor control: 140 Running small motor: >200 After running small motor: 167 Exit motor control: 140 Disconnect small motor: 135