I bought the display along with the camera board v2 a couple of months ago to work on some projects with my Raspberry Pi 2 but only recently found the time to actively experiment. Now unlike the camera board where there is actual official entry in the FAQ for the Raspberry Pi (see here) I seem to be unable to find any for the official 7" display especially in terms of power consumption though there are plenty of blog posts that discuss the topic.
My power supply (5V/2A...hopefully) is not the official one. It came with the Raspberry Pi kit I bought (plus casing, fan, heat sinks, SD card (a very crappy one from Intenso; had to buy a new one since it got corrupted pretty fast) etc.). I have noticed the following:
- Active Ethernet connection (a single SSH session running between by notebook and Raspbian) + attached display (power goes through it to the Pi) - I sometimes get the colourful square depending on what I do software-wise which indicates power issues. Touch on the screen works
- Active Ethernet connection (same as above) + attached display (same as above) + attached camera board - same thing with the square but in this case the touch doesn't work.
I would like to combine both the display, Ethernet connection and the camera board and I would like to know what the power consumption would be in such a scenario. Any ideas?
The Pi 2 requires approx. 1.8A, the camera on the other hand requires 250mA which would make the 5V/2A power supply enough for the two to run without any issues. If I take the data provided by the blog post I have linked above the display requires around 460mA. So for the three together I would need around the 2.5A mark. Is this a correct assumption? Or should I use two power supplies (one at 5V /0.5A for the display and one 5V/2A for the pi) separately?