My A500 "project" pics, details, build log?

[cameng]

I suppose I should put the functional A500 back together... didn't have any luck getting the faulty board working

http://www.amiga.org/forums/showthread.php?t=61942

Was looking at a beige LCD monitor for $15 at cash converters.. don't know if its still there, but who wants a beige LCD monitor! lol

Plenty of silver monitors from back in the day, dont know if thats much better. Got my old LG at my sisters house on there PC. 4:3 with a low native resolution, should match well. All though it is 19'' which will probobly still make games look a bit chunky.

Sold my miggy before I got in to modding cars, you would probably like our SP20 sitting in the shed. Now how can I fit my L34 into it? I also still have one RC car (a Hornet) and a Chopper:)

[AmmoJammo]

I already have a 17 inch 4:3 LCD, I was only going to buy the beige one because its beige! :p

[AmmoJammo]

bought it... its more white than beige, but still suits the Amiga better than silver or black.

Says "multisync" on it, but only syncs down to 25khz..

however, I only paid $10 for it, not $15, and it has built in powered USB ports, which means I can easily find 5volts in it to run the GBS8200, PLUS, I can replace the USB sockets on the base with amiga joystick ports... woot!

[Azryl]

That is a great price for such a nice little monitor... well done!

Az

[djos]

Nice work AJ!! gonna have to pay my local Cash'ies a visit!!

Btw, I doubt you'll get enuf juice out of a USB port to power the GBS8200, it needs 1amp and iirc the USB is a max of 500ma.

[AmmoJammo]

Btw, I doubt you'll get enuf juice out of a USB port to power the GBS8200, it needs 1amp and iirc the USB is a max of 500ma.

it needs about 400ma

[AmmoJammo]

I'm going to call it "less than 500ma"

I may have tested it with every multimeter I could find in the house...











This last one is a clamp meter, designed for measuring upto 1000amps, so its not as accurate at half an amp


Initial startup it draws about 330ma, which increases to 460ma once its fully booted and displaying an image.

[AmmoJammo]

the "USB DC OUT" on the back of the monitor isn't a regulated 5volts, the regulator is in the base of the unit, with the USB hub.. kinda just posting this here for my own future reference

so, I might just build another powersupply into the base.

[djos]

nice, good to know the gbs will run on 500ma.

[AmmoJammo]

When I removed the bottom of the base, I was slightly amused to find an external powersupply mounted internally, and also glad about the extra space free in the housing...



Under the plastic cover to the right, is the fully self contained 4 port USB hub, has a 3amp 5volt power supply on the board... this is connected to the back of the actual LCD screen, 12volt, ground, and a signal to switch the 5volt supply on only when the monitor is on... excellent!



after removing the USB hub... eh look! the GBS fits going to add an "Amiga" video port on the back of the stand in place of the USB socket, and run the VGA output from the GBS, up through the stand and into the back of the monitor... don't you just love when a plan comes together! two of the mounting holes even lined up!

[djos]

Nice, you really scored with that monitor!!!! :cool:

[AmmoJammo]

*cut here*

hmm... maybe...

[mc68070]

Could you please describe (or give a link to) the connections between the Amiga and the GBS?
How low should the LCD monitor be able to sync to work with the GBS?
Thanks!

[AmmoJammo]

Could you please describe (or give a link to) the connections between the Amiga and the GBS?
How low should the LCD monitor be able to sync to work with the GBS?
Thanks!

Its just red, green, and blue signals from the Amiga, as well as ground, and the C-sync signal...

http://www.hardwarebook.info/Amiga_Video

They can simply be connected directly from the Amiga, to the GBS either using the white plug and wires it comes with, or into the "VGA IN" socket on the GBS.


In my case I'm using the Amiga to Commodore 1084 cable, so am using a 9 pin connector

http://www.hardwarebook.info/Commodore_1084d/1084dS

as far as I'm aware, any VGA monitor will work, as long as it can run at least 640x480.

[AmmoJammo]

jigsaw puzzle?

no, hacksaw puzzle... :p

[djos]

Does the power circuitry still work post surgery?

I must admit I was wondering how you'd do it, I was thinking dremel + cut off disc.