Convert wireless keyboard to wired

February 19, 2009 at 12:21:44
Specs: Microsoft Windows XP Professional, 1.729 GHz / 2039 MB

Hey there

So let's say I have a wireless keyboard/mouse system. The receiver has a power plug (to charge mouse; it is a cradle for it as well as receiver), a USB plug, and a PS/2 mouse connector. All functions work with USB only, it seems.

Now, suppose the keyboard eats batteries like mad, but since it's just sitting on the desk, it would be more practical to make it wired. This keyboard is a favourite, and it's not cost effective (nor would I enjoy it) to replace it with any wired keyboard on store shelves today.

What would be required to convert the keyboard (ignore the mouse, it is not needed) to be wired?

I have a USB cord out of a now-dead mouse which can be used, if the wire can somehow run directly from keyboard to PC. If the receiver must be connected somehow, how would I go about wiring this, since the goal we are trying to accomplish is to eliminate the batteries?


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February 19, 2009 at 12:31:19

I find the batteries lasting about 6 months in my wireless devices using quality batteries. Not much cost there.
I doubt what you are trying to do is possible or practicle. There are plenty of wired keyboards to pick from.

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February 19, 2009 at 12:49:59

You say "Let's say I have..." and "Now...suppose". So, is this a hypothetical, or a specific question?

"So won’t you give this man his wings
What a shame
To have to beg you to see
We’re not all the same
What a shame" - Shinedown

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February 19, 2009 at 13:10:54

Just provide wired power instead of using batteries. Since you are willing to accept the "wireless" keyboard being tethered to a wire anyway, since all you want is to not have to buy batteries for the keyboard, then just provide a wire to the keyboard which provides the same voltage as the batteries. If it's 5 volts or less, you can take the power off of a USB port. Otherwise, find a power brick which provides the voltage the combination of batteries in the keyboard provides and just run a wire into the cavity where the batteries go and connect the positive to the + terminal and the negative to the - terminal and use the keyboard.

Note: do try to determine the current the keyboard requires if you try to use USB power. If the keyboard draws too much current, the USB port could be damaged. I can't imagine it requiring too much current, but you do claim it "...eats batteries like mad".

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February 19, 2009 at 13:15:36

anmor, I agree it is not necessarily the most practical thing to do, but anyone who uses a computer frequently gets to like their working environment and will usually end up being picky about it. That is the case here.

Jennifer, in fact, you could call it hypothetical - I am asking for my friend and the model of keyboard is not available. Wording it as though it is hypothetical helps avoid questions like "what kind of keyboard" as I am not so much asking for specific instructions, as I am asking for a general explanation of the concept.

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February 19, 2009 at 13:24:11

oops pyrolitic, I took too long to write the previous reply...

Your suggestion actually sounds excellent; it is something we considered but I had concerns about the exact voltage/current requirements of the keyboard. As I understand it, if too much current is drawn, the controller will shut off the port...obviously not something to mess with but good to keep in mind anyway.

I believe it takes 2x AA battery, where standard ones are something around 1.5v I believe. That would put it at about 3v. I have an adjustable power brick which has 3v and 1.5v setting options, and can supply 300mA max (USB is 500, isn't it?). Perhaps we will try with that.

Thanks for the input...if any other ideas surface please do post them

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February 19, 2009 at 13:24:36

Let's suppose that what you're proposing is totally impractical & borders on being completely ridiculous....

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February 19, 2009 at 13:30:22

A set of rechargeable batteries might be the
most cost effective method.

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