Im trying to build a VGA to TTL converter for a mono AMBER m

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Anonymous
2016-06-16 08:06:05 Post No. 1009493
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Anonymous 2016-06-16 08:06:05 Post No. 1009493 [Report]

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 ?

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Anonymous 2016-06-16 08:10:52 Post No.1009495
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Anonymous 2016-06-16 08:10:52 Post No.1009495 [Report]

Functional completeness famalam

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Anonymous 2016-06-16 08:19:07 Post No.1009498
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Anonymous 2016-06-16 08:19:07 Post No.1009498 [Report]

>>1009495

so I cant use nay of the above ICs ?

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Anonymous 2016-06-16 09:05:04 Post No.1009505
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Anonymous 2016-06-16 09:05:04 Post No.1009505 [Report]

>>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.

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Anonymous 2016-06-16 11:10:11 Post No.1009540
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Anonymous 2016-06-16 11:10:11 Post No.1009540 [Report]

>>1009505

I dont have that much knowledge and experience

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Anonymous 2016-06-16 11:41:13 Post No.1009550
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Anonymous 2016-06-16 11:41:13 Post No.1009550 [Report]

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.