high pitched squeel when using gps mouse on laptop
high pitched squeel when using gps mouse on laptop
Just got my Holux gps mouse today, hooked it all up, works a treat. I'm using the USB to serial software that came with it, works fine.
So, to my problem/concern.
When the gps mouse is plugged in and is working, there is a high pitched squeel, not loud, but annoying, coming from the laptop. As soon as i close the program that is accessing the gps mouse, the squeel goes away. i dont wanna stuff my new laptop, so does anybody know what is going on?
thanks
marin
So, to my problem/concern.
When the gps mouse is plugged in and is working, there is a high pitched squeel, not loud, but annoying, coming from the laptop. As soon as i close the program that is accessing the gps mouse, the squeel goes away. i dont wanna stuff my new laptop, so does anybody know what is going on?
thanks
marin
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Re: high pitched squeel when using gps mouse on laptop
The "squel" can only come from a switch mode power supply. Most likely the one that powers your USB port. Your GPS Mouse must be powered from the USB port, in which case it is most likely drawing a fair amount of current, thus causing the switch mode supply in your notbook to squeal. Annoying, but nothing to worry about. Nothing you can do about it really, unless you get an externally powered USB hub.marin wrote:Just got my Holux gps mouse today, hooked it all up, works a treat. I'm using the USB to serial software that came with it, works fine.
So, to my problem/concern.
When the gps mouse is plugged in and is working, there is a high pitched squeel, not loud, but annoying, coming from the laptop. As soon as i close the program that is accessing the gps mouse, the squeel goes away. i dont wanna stuff my new laptop, so does anybody know what is going on?
thanks
marin
EcoDave
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For a GPSr, yes. That's 0.85W. A GPS like the eTrex draws about 1/3 of that.marin wrote:from the specs sheet
<p>
Power consumption
<170mA at 4.5- 5.5V input
<p>
is this alot?
For a USB device - no. The USB port can supply up to 500mA @ 5V (it's intelligently programmable), but that doesn't mean the switch mode supply used in your notebook has to be efficient and not make any audible noise at that current or lower.
It's just a case of a poorly designed switch mode power supply - very common.
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Bill Hewlett & William Packard would be turning in their gravemarin wrote:thanks peoples, ive put it down to this switch mode power supply, but bloody hell, its a HP laptop 3ghz, only 2 weeks old, u reckon they could get these things right?!?!?!?!???!!!!!!!
Not the least of which when the computer division was given the rights to the HP name, and the TMG got spun off into Agilent
EcoDave