Hello everybody,
as promised, here's the seperate thread about the construction of my first Televisor using the club's 15 inch stainless steel Nipkow disc.
I constructed the LED/sync and motor circuit as they're described in the handbook, the only difference being that I replaced two resistors on the motor PCB with a potentiometer in order to control the amout of PLL control over the RPM according to a hint I got from Klaas. I've also omited the 10 Ohm resistor in the motor's positive lead.
The LED matrix consists of 8 ultra-bright white LEDs, each with their own resistor.
In order to get an even illumination, some distance was needed between the LEDs and the diffusor (two layers of the club's diffuser film). To achieve this, I constructed a roll from thick cardboard to use it as a "light tunnel".
The motor used is an industrial quality pancake (or disc) motor. Luckily, the shaft of the motor measures exactly 6mm, just like the center hole of the disc. To fix the disc to the motor, I took an old toothed wheel that has a 6mm bore as well and can be fixed to the shaft with two grub screws. That wheel, I glued to the Nipkow disc with some industrial grade polymer glue. The glueing power of that stuff is crazy. I ran the TV for about an hour since it was constructed and so far, the disc stays in place. As the motor shaft goes through the toothed wheel and the Nipkow disc, the radial forces while spinning are taken by the shaft and not the glue.
The rest of the device is constructed mainly from MDF and various bits and pieces I had laying around in the workshop.
The audio amplifier is a cheap kit I once bought for a few Euros which drives a tiny speaker.
I tried to capture the process in a few pictures as good as possible.
Please see the photos attached, each with a short description.
If you have any questions, suggestions, please let me know.
Please note that the case is still in the early stage and will look a lot nicer in the end (hopefully)