49Views4Replies

Author Options:

Better RF Mouse Range Answered

Hello. I got a Wireless Mouse that still working fine.

The signal between the Mouse and its receiver is not so great, about half meter, and it stop responding. So I took apart the Mouse and its Receiver. The antenna of the Mouse is kind of steal (I think but its color) and the one of the receiver is coil of very thing copper about 3/4 turns around a piece of plastic. So as said I would like to increase the signal between both, for better rang. What I have found around the best material is copper, so here is my issue. Is it better to modify the antenna of the Mouse or its receiver?? Should I rather use thicker Copper Wire and do few spinning around a piece of plastic, or use a thinner Copper Wire and do a lot of spin around a piece of plastic. So what better for a strong signal: - thicker wire and less spinning or - thinner Wire and more spinning

Thanx for those that would give a some advise/recommendations. I am will upload pictures later when possible.

PS: I manage to add to it a Switch to turn off the mouse to extend battery Life.

Discussions

0
None
Downunder35m

7 months ago

Only see a solution by measuring the frequecy of the antenna.
12MHz is on the crystal but that can be for the chip, the antenna or both, so no real clue.
Coiled antennas like this often use AM modulation and quite low frequencies.
the inductivity matters too.
I would just opt for a cheap wireless mouse to replace it.

0
None
saadlandDownunder35m

Reply 7 months ago

I dont really got a clue on how to measure the frequency of the antenna.
Actually this mouse was around in some drawer and suddenly my main Mouse got sick, its scroll is no more responding, it got an optical scroll, (I treated to fix it, as all the rest is working) I tested the IR led in an another Mouse and it is ok, and the IR receiver also is ok, so its pb looks more complicate for me, Maybe you got some idea about this issue??
About this Microsoft Mouse (the one corresponding to the topic), I ll keep it around, maybe to use it with myTab as OTG, and get myself another cheap wireless as my main one.
Thx again for your help ;)

0
None
Downunder35m

7 months ago

It is not a matter of material or wire thickness!
For these frequencies the exact lenght and shape of the antenna is paramount.
Can be just a trace on the circuit board, a dedicated antenna or a piece of wire.
And early desptop things were only created for desktop use - so a range of 0.5m was considered plenty.
Even later models struggle with more than 1.5m and only the modern ones now offer 10 or more meters.

Another thing to consider is the frequencies used back then - a lot of them don't like BT or Wifi near by.
If you want to change your antenna you first need to know the exact frequency used.
From there you can create a simple wire antanna with ease and a shaped one with some decent calculations.
However I would not expect to get more than an additional 10 or 15cm of range out of it.

0
None
saadlandDownunder35m

Answer 7 months ago

Thanx you for your help. I know a bit about the wifi influence aroud and BT, I do not have a Router aroud my PC, prefere net by Ethernet...
the adefault antenna is a small copper wire (its seams) around a big piece of plastic.
I ve added picture for better idea. some my idea was to increase the spinning of wire and decrease the size of the piece of plastic.....
ok I do not want to get a signal of 10m also,I am realistic, just 1m or 1,5m. Now I have to put a HUB on my table and connect the receiver to it for the mouse to respond, if I connect it directly to the back of the PC under my table, it do not works.
So I am looking to increase the range in a realistic way, 1m /1,5 would be ok to me.