I'm toying with an ideas again.
The red/green/blue output from the old BBC micro computer
to the monitor is not analogue so the brightness cannot be controlled.
I was wondering if anyone has ever put 3 transistors, one in each colour,
in order to control the brightness ?
Using faster assembly language one might then have a machine which could run
variable number of lines for NBTV.
I was thinking of that LEGO camera that was mentioned by Harry, and using the Beeb
as the display for demos.