Contribute
Register

I have decided to hack eMac's CRT (To work with any standard motherboard)

Status
Not open for further replies.
Hey all , I've been unavailable to work on hobbies for a number of years but I now have some time again for a bit
and I was hoping to work on an iMac.
I was wondering if anyone has done this same hack but with a iMac slot loading G3. I've made good progress with help
from people over at macrumors but I was hoping that someone over here might have some info on connectors and boards.
I'm putting together diagrams with pinouts and would love some input.
Below is a link to the diagrams and code.
I've also included videos with my progress at the bottom of the page.

At the moment I/m looking to find out how the down converter board gets its power and what the pinout is for the
earphone jack.

Thanks in advance.


https://github.com/qbancoffee/imac_g3_ivad_board_init
 
If anyone is interested or has more info in the way of sniffed comms between the iMac G3 DV logic board and the IVAD board
please share.

With lots of help, Ive gathered enough info to make three printed circuit boards to convert the iMac G3 DV into a CRT monitor which can
be used by a regular computer with a VGA out.

here is one of the videos.

Here is the link to the repo.
https://github.com/qbancoffee/imac_g3_ivad_board_init
 
I forgot to post here.

Here's a video of me disassembling a working iMac G3 DV and fitting in the boards to turn it into a monitor.
At the end I play Minecraft with it as the monitor. BTW this is a non destructive mod and it can be easily reversed.

 
Hi, amazing work.

Recently I was given an 1Ghz ATI Emac, wondering what to do with it jumped in this thread. I havn't any arduinos to spare, but several ATmegas and modded vUsb paperduinos so I need to modify the code a bit.
Since I don't want to add more weight to the alerady heavy rig (more that 20Kg.), I was wondering if it would be possible to use the original PSU to feed the ino and a Pi that would draw no more that 2,5 Amps. I've tested the blind mate connector with the AC connected and checked with a PDF from https://tim.id.au/blog/tims-laptop-service-manuals/#toc-apple found that pns 7 and 8 must be 12,25V, testing a bit more found what I think it must be a ground pin at #9, and several other voltages that I don't knw yet what are they for.

This is what I've found with the AC power cord plugged, the logic board dissasembled and the Ivad disconnected.

Pin---V
1----?? no voltage detected
2----11,25V
3----?? no voltage detected
4----?? no voltage detected
5----7,5V
6----7,5V
7----12,10V (manual says that it must be 12,25 but there are is always a tolerance in the tester I supose)
8----12,10V (manual says that it must be 12,25 but there are is always a tolerance in the tester I supose)

9----Ground
10---5V (fluctuating, maybe here is the power on?)
11----?? no voltage detected
12----9V
13----?? no voltage detected
14----?? no voltage detected
15----?? no voltage detected
16----?? no voltage detected

In the atacchement the firts diagram shows continuity, seems that number 9 have connection with a lot of pins, so I suponse it can be ground. Since connecting it to the other pins seeking for voltage gives positive currents, it most probably ground, or at least it simulates to be one very well.

Also finally fopund a valid archived copy of lbornad headless server page at archive org since I can't reach the links listed in sevral trheads. https://web.archive.org/web/2018081...sl.pipex.com/eServer/index.html?showpage=true
 

Attachments

  • pins blind mate.jpg
    pins blind mate.jpg
    44.2 KB · Views: 79
Last edited:
Status
Not open for further replies.
Back
Top