LSDJ Keyboard Help Please

i'm no electrician, but let me just pull up the wiring diagram for the PS/2-DIN keyboard here...

as seen on the diagram, the +5V pin (pin 4 on PS/2, pin 5 on DIN) is where you should wire up the positive terminal of the battery.
you'll also need to wire the negative terminal of the battery to the GND pin on the keyboard (pin 3 on PS/2, pin 4 on DIN).

at least that sounds right

Last edited by Aeros (Apr 11, 2012 2:29 pm)

unless i've gone crazy

both the DMG-07 and DMG-04 cables have all the proper connections, including the 5V.  this is the reason why people scavenge for these a bit.

the 4-player adapters are just ideal because you have more sections of cables with plugs on the end, and you've got to cut the cable anyways so doesn't matter. 

so if you're using an official nintendo cable, you don't need to switch around the pins at all.  if you've switched them on an official cable that already had the proper connections, then the solution is to either, 1) reverse the switching you did and fix it back, or, 2) just pay attention to your wiring connections, not really what the wires should be, what what they've become as a result of your pin switching.

i haven't done this in a realllly long time though, but i'm pretty sure both the DMG-04 and -07 have the 5V connected, unlike all the other cables around.

and to your other point, yes you can add an external power source, it needs to be regulated to 5V, +/-10%, and i think supply at least 500mA (i can't remember the PS/2 specs).  you need to tie this into your ground and this will feed the keyboard's power.  you can register key-presses then.  the gameboy doesn't need the extra power,

hope that helps some.

In my case never worked with the DMG-04 cable and an external power supply (and it had 5v regulator)
So I bought the 4 players adapter and worked at once! I believe that followed the same tutorial as you... but let me check when I get home

Hi there,

I've been trying to build my own LSDJ keyboard following the different online tutorials I could find & searching for help on the internets, but unfortunately after many tries, I still can't seem to make it work.

I'm using a DMG-07 link cable, and the keyboard I've found is an old ACER 6512-TW.

Keyboard

PS/2 connection

DMG-07 wires

Keyboard wires

Reslults I got from testing many possibilities are the following :

* Whenever the brown DMG-07 wire is connected to the brown wire of the keyboard, LSDJ won't start, and if I plug it when LSDJ is running, it crashes.
* The Num / Caps / Scroll Lock lights blink at startup whenever the Brown DMG-07 wire is connected to the Red Keyboard wire.
* When the Brown & Blue wire from the DMG-07 are respectively connected to the Yellow & Brown wires from the keyboard, the Num / Caps / Scroll Lock lights blink all the time.

In any case, I haven't been able to produce a single sound using the keyboard in any configuration I tried.

PLEASE HALP !

Edit : I actually cut off the DMG-07 red wire, following Thetris' tutorial, I should actually test this wire, too.

Edit 2 : After more experiments, I've found this wire setup that makes *something* happen, not anything good of course, but still...

DMG-07 -------- Keyboard

Brown -----------> Red
Blue --------------> Grey
Red ---------------> Brown
Green -------------> Yellow

This makes LSDJ really slow, and the indication I** (** because the numbers are constantly changing) appears at the left of the scrren, also the M, U, T, E, letters are sometimes appearing and disappearing. This happens without me having to push anything on the keyboard. It's like LSDJ is getting some data from the keyboard, right ?

Last edited by seal of quality (Apr 25, 2012 5:06 pm)

DMG 04s don't have the 5v pin connected, and they have less redundant wires than most third party cables. So you have to sacrifice the ground pin to get the 5v. Kitsch, you may be confusing them with genuine gameboy color link cables, which I believe have the 5v pin connected.

I recommend you guys use a multimeter and the continuity setting to do this mod. You can't go by the wire insulation color because they're very rarely ever consistent.  If you don't have a multimeter, you can make a DIY continuity tester with a battery and an LED, just don't use it for other applications.

I actually started making tests with version 4.6.3 and nothing happened, now I know why ! So I switched to an older version (3.3.9) and I stard having LSDJ behaving funny as I mentioned in my previous post.

Sync is on KEYBD, and I have the song running, yep. I don't need to have any note written in my phrase, right ?

Thanks for the help !