making my own Amiga Video adapter 23pin to 15 pin svga

[Garyed40]

Hi all

I've given up trying to get a adapter for a reasonable price can someone direct me to a website to help me make my own adapter?

thanks everyone
Gary

[SamuraiCrow]

Download the instructions HERE!

Please note that this isn't a very good example of how to design a circuit.  All of the grounds are connected to each other!

Digital power grounds should be connected only to the power ground and the signal grounds on the computer should be connected to the appropriate signal grounds on the VGA connecter.

Check the documentation of the A1200 for pinout information.

[SamuraiCrow]

HERE is a better example of how a VGA adapter SHOULD be designed.

-edit-

It isn't much better but at least it uses a capacitor on the digital power subsystem.

[Garyed40]

Thanks Technoid

Maybe one of these days I'll be brave enough to try to make it..

Take care
Gary

[nex4060]

I had trouble to find the correct low-voltage high speed and-gate IC 74LS08N. Do any of you know an other IC I can use?

[SamuraiCrow]

Sure!  Just use a hex-inverter and do a double inversion instead of tying the leads of an AND gate to the input.

[adolescent]

FYI, last time I checked Vesalia (www.vesalia.de) had VGA adapters for ~$18.00.  

[Generale]

I used a high speed hex inverter. Worked fine.
As for the 23pin connector in my case, I just file away 2 pins worth of a d25. Doesn't look pretty but it works. As an added bonus 25 pin shells are abundant and large enough to fit the IC and cap in. Just don't put the screw thingy in the filed off side. It'll hit the case and stop the connector from plugging in.
Just thought I'd mention it because I absolutely could not get a d23.

[clockmstr]

I modified an A520 with by adding a hex inverter so my A520 had all the standard A520 outputs plus VGA out.

[Russ]

$5 for male or female 23 pin solder cup connector. They are new.
http://www.mrhardwarecomputers.com/data/ms.htm

[amigakit]

We sell the VGA adapters here if you don't have any luck building your own.

[lorddef]

I made one of those about 5 years ago, I just went to maplin and bought the closest chip I could find, didn't wory about high speed whatever etc and it worked fine untill I trod on it.

[Garyed40]

Re: making my own Amiga Video adapter 23pin to 15 pin svga


We sell the VGA adapters here if you don't have any luck building your own.

----------------
AmigaKit.com - the online Amiga store

Website: http://www.amigakit.com
Forums: http://forums.amigakit.com
Tel: +44 (0) 870 199 9569
Fax: +44 (0) 870 706 4427



Thanks friend but for us in the US that 14.99 GBP becomes something like $30 US. Some of us don't have that to spare for a video adapter

Gary