Im trying to build a VGA to TTL converter for a mono AMBER m
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Im trying to build a VGA to TTL converter for a mono AMBER monitor
http://www.epanorama.net/faq/vga2rgb/vga2rgbs_ttl.gif
now this diagram shows it uses a 74LS86 ic,but I only have these ones : 74C00N,74C04N,74CO8N and 74C10N
now comparing the diagrams between all them they all seem to be very similar only OR/XOR
and it say they have TTL compatibility
any thoughts ?
Functional completeness famalam
>>1009495
so I cant use nay of the above ICs ?
>>1009498
Couple of things:
- That circuit of yours does nothing to video signal levels, it just combines HSYNC and VSYNC. Ye olde amber monitors wanted TTL video as well.
- Since you don't need speed, you could make a clumsy contraption using those 4 IC types you mentioned. You might need to add input pull-ups, though, since they expect CMOS level inputs.
>>1009505
I dont have that much knowledge and experience
Chances are the monitor won't accept VGA line frequencies. VGA runs at about twice the horizontal frequency which the monitor won't be able to handle.