I am doing a new video series on YouTube (videolabguy channel) and all of YOUR
input now will be greatly appreciated and acknowledged.
https://www.youtube.com/watch?v=4UB9-FnBRAU
I saw that some of my articles were causing confusion for some members.
file:///F:/DataFiles/WEBPAGES/LabGuysWorld_010/NBTV_32LineColor_001.htm
Apologies. I am attempting to be as simple as possible.
Be warned, I have an extensive background in broadcast video television equipment design
and an absolute loathing of "spaghetti" schematics.
What does the community consider the standard polarity for 32 line NBTV sync?
Positive or negative? Makes no difference to me, but I will need to know.
I can and will design my circuits to work "upside down" if positive sync is the rule here. Signal polarity? No problem!
Since you all seem to use audio sources, like sound cards and CD/multimedia players, it
will be presumed that your signals are AC coupled? High impedance? Voltages over a broad range?
I will be using my Aurora World Converter. Please note:
1. The outputs are all 1Vp-p, negative sync or black, terminating (properly) into 75 ohms.
2. The outputs are all DC coupled, completely eliminating the need for DC clamp circuits.
3. DC coupled outputs also make sync separating as simple as it gets.
4. I will have to build a DC to AC coupled driver to emulate the interfaces commonly used by others.(?)
My project goals are:
1. Cover the NBTV signal in great detail.
2. Build a flawless sync separator with perfect pulse separation of line and frame pulses.
3. Build a 3 phase (quadcopter / disk drive) motor driver that runs dead on 750RPM from the get go before servo feedback is added.
4. Build a phase controller that locks the Nipkow disk to the sync as near to instantly as possible.
5. Demonstrate and build a video to LED driver that is remarkably simple. And linear.
6. Demonstrate an adaptive gamma circuit that covers both positive and negative ranges for driving my linear LED driver.
(This last one allows for gamma compensated signal designs to be easily accommodated)
Sound interesting?
Richard Diehl, Labguy, Labmeister (on this group and Ebay), and Videolabguy on YouTube (all one guy!)