6" Monitor Project

this kinda got me curious. I'm using a 13" monitor currently, which works fine, but a smaller one sure would be nice.
Anyway, on the video sync seperator - if i bought one, i think i would try hooking up the composite sync to both the v and h sync first. You'd still need to invert the signal, but you might get by without that darned 12 buck EL4583C. Failing that, i think i might even try a LM1881N. 2.50 each. It puts out a seperate vertical sync, run that to the vert sync, and the composite to horizontal sync.
Anyway, it doesn't seem anyone actually has one yet, but its something to consider.
Too bad i just placed my jameco order earlier today.....
 
Search RGVAC for Samtron. Lot of info from years ago. Pretty sure someone used a LM1881 at one point.
 
Search RGVAC for Samtron. Lot of info from years ago. Pretty sure someone used a LM1881 at one point.

i did - and your right. Found 2 references. First was stating that it liked composite sync ok on the horizontal, and then one using the lm1881 for the vertical sync.
Here's the datasheet for the lm1881 -
https://www.jameco.com/Jameco/Products/ProdDS/107140.pdf there's a connection diagram on page 2.
That combined with an inverter to invert the sync signal, and that should be all thats required. Course this is pure speculation on my part, as i don't have one yet.
 
i did - and your right. Found 2 references. First was stating that it liked composite sync ok on the horizontal, and then one using the lm1881 for the vertical sync.
Here's the datasheet for the lm1881 -
https://www.jameco.com/Jameco/Products/ProdDS/107140.pdf there's a connection diagram on page 2.
That combined with an inverter to invert the sync signal, and that should be all thats required. Course this is pure speculation on my part, as i don't have one yet.

I don't have one either. After looking into what was required I decided there several other solutions that were easier.
 
well, they finally called me back today, so i placed an order for 2. I'll order the lm1881 with my next mouser order as well. Supposed to ship the week of the 25th of this month via ups, so its still at least 3 weeks before i actually see one.
 
Anyone get started yet?

I want to get the right parts and my problem seems to be with the Pot.
What kind of pot should I be looking for? Parts list?
 
I bought 3 of these years ago and have not gotten around to building the adapter circuit. I'm interested if anyone finds or comes up with a cheap and dirty solution. I will build 3 for myself.

Thanks,

Bill
 
Looking at the different threads, it doesn't seem that hard at all.

I would think that it's mainly about what are the easiest ways to get the parts cheap? Group order?

Putting out the parts list seems a first order of Biz:

* PSU (ADJUSTABLE, with 5V, 12V, GND)
* component board (with metallic islands on the backside)
* sync splitter (EL4583C) Digikey # EL4583CN-ND $11.85 (Price break at 25 for $8.62)
* hex inverter (74LS04) Digikey # SN74LS04NE4 $.23
* 22K potentiometer ??? which one to use?
* .1mf capacitator
* thin cables (in different colors)
* 14 pin IC socket (optional)
* 16 pin IC socket (optional)
* connectors (optional)
 
Last edited:
Well.. I'm going to put list together and order some parts for my monitors. I'm not buying excess when I might be paying too much for 1 part. I am going to build one for cnlmoore though.

Advice to others: Making the mod nice as you can will also make it easiest way too. Use sockets for chips.

Kevin
 
Well.. I'm going to put list together and order some parts for my monitors. I'm not buying excess when I might be paying too much for 1 part. I am going to build one for cnlmoore though.

Advice to others: Making the mod nice as you can will also make it easiest way too. Use sockets for chips.

Kevin

If you can put out your parts list and where you are ordering, that would be great. I think i'm going to order enough parts to convert the 4 monitors I have even though 1 is broken.

I started to mock up a project using this monitor (case) and sadly the yoke sticks out the back of what I'm planning. I wonder how ghetto it would look with a hump coming out of the back to account for the back of the yoke neck.
 
Last edited:
From what I google, that is a true RGB CGA monitor.. yes, it should work with no mod.

Kevin

Next time I hit up my garage I'll get a model number if anyone is interested. Its a cool little monitor and has composite inputs (RCA and BNC) as well. Its a color monitor too and battery capable but the battery went bad eons ago.
 
Next time I hit up my garage I'll get a model number if anyone is interested. Its a cool little monitor and has composite inputs (RCA and BNC) as well. Its a color monitor too and battery capable but the battery went bad eons ago.

Probably a broadcast monitor like the Sony PVM series. A high percentage of them take RGB directly. Usually you can pick them up pretty cheap and they are a lot easier to use then the monitor discussed in this thread.
 
i thought it would be cool to get like 16 of these and multiplex em togther to make a mini version of a multiplexed monitor like the one that used to be in my local cade back in the day...
 
i thought it would be cool to get like 16 of these and multiplex em togther to make a mini version of a multiplexed monitor like the one that used to be in my local cade back in the day...

You need to take a pic of that. That would be pretty neat to see.
 
Back
Top Bottom