Progress on the Mechanical TV Project
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I'm posting this as an example of what can be done with a mixture of techniques and materials that come to hand, so consider it encouragement for those who are working on the club project at a slow pace like me, not necessarily a how-to!
As of 15 December 2001, The project is in the following state:
Electronics completed:
Red, green, blue LED array
Video preamp with low-frequency compensation for CD player
Sync separator
Clamp pulse generator
LED driver (one of eventually three)
"Missing sync" frame detector
Line and frame sawtooth generators
Audio amp / speaker driver
Mechanics completed:
Laser-machined scanning disk purchased from Peter Yanczer, president of the Experimental TV Society
Motor obtained for direct drive: 44 volt servo motor supplied by a friend
Mounting hub for the scanning disc - brass, turned by the friend who supplied the motor, then drilled for mounting hardware and drilled and tapped for setscrews
Basic chassis constructed of plywood and Plexiglas covers
Motor mount consisting of soft metal pipe straps
Makeshift aluminized cardboard light concentrator with diffusing plastic for LED array - to be repaced by more solid version using ground glass
To Do:
Permanent LED shroud and ground glass
Motor servo (hoping to make frame servo for automatic framing)
Two more LED drivers
Chassis face plate and rear plate
When it all works: stain/finish the woodwork.
NEXT Project: mechanical color camera to provide color signal for display.
