Dragon's Lair Fans - Arcade Lifestyle
General Chat => Technical Area => Topic started by: level42 on September 22, 2014, 12:42:39 AM
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nice !!
http://hackaday.io/project/2871-ARCADE-XY-VECTOR-MONITOR-FROM-SCRATCH
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very interesting.
I already posted a question :D
I had a similar idea but I haven't enough TV repair knowledge to realize if.
THeoretically my idea has sense but i dunno how to realize it.
a normal raster TV has 2 ramps generator in order to draw a picture on H and V. These 2 ramps have different frequencies of course.
My idea is to substitute these ramps generators with the X and Y signals removing all the parts about blanking signals and so on.
blanking has to be adapted in order to be controlled by Z signal.
In this way you don't need any additional board with amplifiers on but only some low power signal adapters.
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I like your thinking but don't forget that you will always need to rewind the yoke. On a raster device the yoke coils have it relatively "easy" as the electron beam always moves in a steady direction (well as long as it draws stuff on screen).
On a vector the beam is steered anywhere across the screen "like crazy" which requires much more energy and normal raster coils can't handle this. Also, because of this extra required power, you will need much bigger transistor output stages to provide this.
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this problem could be for V only. Anyhow I'd like to have this project so advanced in order to "see" the entity of the problem directly on the screen ;)