My Raspberry Pi is attached to the back of the 7" display and, as such is in a case such that I cannot easily gain access to it to attach the RPi camera flat cable.
What other options are recommended - preferably USB attached - that will also work for me? Is the Logitech C920 Webcam the best (supported) option? There seem to be a number of options and derivatives for this device. Which one should I go for?
My grateful thanks to all involved in this exciting project. Just seeing a test card across the shack was quite a thrill!
It doesn’t make the camera HDMI compatible it just allows you to use a HDMI cable which is much more robust than the flat ribbons.
I recommend a RPi Camera with the HDMI cable adapters described by Colin. If you modify them as described here: https://wiki.batc.org.uk/CSI-2_to_HDMI they will work with most HDMI cables up to 2 metres in length.
I use them on 3 Portsdowns, and also on a Jetson Nano (which uses the RPI camera as well).
The long Ribbon Cables (available from https://coolcomponents.co.uk/) are very useful so that you can position the HDMI sockets on the front/back panel.
If you are going to try a webcam, then I recommend the C920. Excellent quality and it is the only one that I test Portsdown releases with (there are still some issues, but it's getting better).
I may well go for a Pi Cam later on as well but right now I am happy enough with the C920 ... I did find, however, that I had to specify it as Webcam rather than as C920 in the Portsdown 'source' menu otherwise it didn't come on. I am still only using Ugly mode so that may be the reason.