Thread replies: 6
Thread images: 1
Thread images: 1
File: Arduino_ftdi_chip-1.jpg (611KB, 2560x1920px) Image search:
[Google]
611KB, 2560x1920px
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.
Thread posts: 6
Thread images: 1
Thread images: 1