Hi everyone,

I am trying to find a low power wireless optical mouse without a power=20
switch. While the microprocessor can be throttled back and the wireless=20
transceiver can sleep when no movement is detected, the LED must still=20
be powered as long as there might be movement. So, there is always need=20
for a power switch.

I'd like to eliminate the power switch by using a vibration sensor to=20
turn the LED on when vibration is detected. I notice there are vibration=20
sensors that claim to be sensitive on ebay:

http://www.ebay.com/itm/Reflection-NEW-801S-Vibration-Sensor-Sensitive-for-=
Arduino-Highly-/291542737641?hash=3Ditem43e14d22e9

OR

I am trying to find a low power wireless optical mouse without a power=20
switch. While the microprocessor can be throttled back and the wireless=20
transceiver can sleep when no movement is detected, the LED must still=20
be powered as long as there might be movement. So, there is always need=20
for a power switch.

I'd like to eliminate the power switch by using a vibration sensor to=20
turn the LED on when vibration is detected. I notice there are vibration=20
sensors that claim to be sensitive on ebay:

http://www.ebay.com/itm/Reflection-NEW-801S-Vibration-Sensor-Sensitive-for-=
Arduino-Highly-/291542737641?hash=3Ditem43e14d22e9

OR

http://www.ebay.com/itm/10X-SW-520D-Vibration-Sensor-Metal-Ball-Tilt-Shakin=
g-Switch-NEW-Arrival-/271677896162?hash=3Ditem3f4143b5e2

And, I can get a low power Schmitt trigger cmos gate that draws around=20
one microamp at 3 volts, and hook that up to disable the onboard LED=20
when the mouse isn't moving (vibration isn't detected).

I also have an idea about changing the geometry of the optical sensor to=20
a reflective mode and narrowing the field of view for the sensor, so=20
that the LED can be run at a significantly lower but that's a topic for=20
another discussion):

So, I have 2 questions........

Does anyone have experience with these small vibration sensors, are they=20
sensitive to detect when a mouse is moved across a relatively smooth=20
surface?

AND

Does anyone know which model wireless optical mouse has the lowest power=20
consumption (best power management)? If so, what chip does it use??

Thanks,

Art


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