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geekhack Projects => Making Stuff Together! => Topic started by: vulture_g7 on Fri, 13 December 2013, 04:28:08

Title: CM Devastator peculiar mod request
Post by: vulture_g7 on Fri, 13 December 2013, 04:28:08
Hello ppl!

I've recently bought the CM Devastator kb+mouse combo for my cheap-o linux box as I needed a simple self-illuminated kb to work at night without the lights on and this combo seemed (and is) decent for the task. The problem is, I didn't realize at that time that I needed to have windows to get the lights on the keyboard - ouch! Dunno if my request is difficult, but here it is anyway:

Is there a way to have the back-light always on? I mean, I suppose I'll have to open the kb and solder/short circuit something (I can do that), but I've no idea what. I could post photos of the keyboard's innards of course. So, anyone thinks could help me on this? I'd love to use this kb on my non-windows machine for my everyday work.

Thx! :)
Title: Re: CM Devastator peculiar mod request
Post by: rowdy on Fri, 13 December 2013, 04:37:17
Seems like it is rubber dome keyboard.  The first thing you could do is get a mechanical keyboard ;)

But anyway, the specs seem to suggest pressing Scroll Lock toggles the LEDs on and off.  Does this not work?
Title: Re: CM Devastator peculiar mod request
Post by: vulture_g7 on Fri, 13 December 2013, 07:21:18
I've got a mech kb for my main setup of course! :)
Yeah, the problem is that scrl lock lights the keys only under windows and nowhere else (linux, macos) and as my target machine is a linux box, I'd like to find a way to light it up permanently.
Title: Re: CM Devastator peculiar mod request
Post by: DrewSmith007 on Tue, 03 June 2014, 00:28:29
I recently bought two of these keyboards and the LED thing was driving me nuts. So, I tore it open and took a look at the board. It's simple enough, I just soldered a jumper between the 5V from the USB line over to the 5V for the LED breakout board. This shot shows exactly what you need to do, just be careful not to solder the pads together or you'll probably fry something.

(http://i51.photobucket.com/albums/f374/drewsmith007/IMAG0350.jpg) (http://s51.photobucket.com/user/drewsmith007/media/IMAG0350.jpg.html)

EDIT: I should add that it does work, but the LED's can't be turned off at all. It's on my GF's PC and I don't know what it does when the PC is off, probably depends on the USB port.

It's been working for all of 15 minutes, so I can't guarantee that it won't cause problems down the road, so proceed at your own risk. However, I can guarantee that you'll void any warranty you have.
Title: Re: CM Devastator peculiar mod request
Post by: Gonzorifico on Sun, 22 June 2014, 08:27:34

"It's been working for all of 15 minutes, so I can't guarantee that it won't cause problems down the road,"

Hey Drewsmith007 Just wondering if it's still working? I just got one of these for a hackintosh and i have the same problem as the guy above, have you had any trouble?

Thanks.
Title: Re: CM Devastator peculiar mod request
Post by: dorkvader on Sun, 22 June 2014, 17:06:13
Based on the nature of the mod, I expect that it'll keep working.

In theory it could break something because you're putting voltage where it's not expecting nay, fortunately in this case it's on the wrong side of a transistor (which acts like a diode) and it can't flow upstream and fry the controller.