Unless that windows box is connected to a robot arm that is pressing
keys, that is totally irrelevent. A keyboard that isn't being used
has no business draining a battery. If it is, the design is crap.
On a very old TV, with a remote control (a motor to change the channels,
ca chunk, ca chunk). It started going on and off and changing channels
by itself. Finally I figured it out (I was about age 10). Something on
the vacuum cleaner was the cause. The wheels on the vacuum cleaner had
a high pitched squeal, and I suppose a higher pitched one we couldn't
hear, and the remote signal was an ?ultra high frequency sound. I oiled
the wheels of the vacuum and it fixed the TV.
I've looked inside those remote controls, they would bang a short
piece of metal that worked like a tuning fork to generate the
ultrasonic frequencies. Later in the late 70's, a grandmother had a
tv with a solid state version that drove an ultrasonic transducer.
Maybe this was newer than I remember, but I really don't think so. It
had, I'm guessing, what you call an ultrasonic transducer. Inside I can
picture an aluminum case about 1" x 2" x 1/4" with a thin metal *thing*
that pointed out of the remote, I think covered with metal mesh or
something for protection.
Now that I think about the late 70's again, I'm sure they were up to
remotes that had as many as 10 buttons and used IR. The ultrasonic one
I was talking about only had 4 commands, channel up, channel down,
volume up, and volume down.
I never saw the type with the tuning forks, that's neat to know.
It used to work, so it's not really a "design" issue - sounds like a
"failure" issue. With the transciever interface REMOVED from the
computer see if the battery still goes dead. If so it is LIKELY a
popped capacitor in the keyboard.
What he means is, I think, that if there is a transmitter that has it's
own wall wart, that plugs into the PC , or if your PC maintains power to
the USB ports even when it is 'shut down' (but is really just in standby
mode), the transmitter end could be continually polling the keyboard and
keeping it active. A lot of PCs, like a lot of TVs, aren't really OFF
unless you yank the plug out of the wall.
If there isn't a human pressing keys, the keyboard should be asleep.
Status LEDs are usually on the receiver for a good reason.
A bluetooth keyboard has a thousand times the sophistication of the
typical IR keyboard and they're smart enough to sleep when not in use.
Why not a rock stupid IR keyboard? Truly, time to switch brands.
On Fri, 07 May 2010 12:19:24 -0400, firstname.lastname@example.org wrote:
reach where nobody uses it, if they even know it's there. I;'ve had
service calls where the customer can't turn the computer on. Because
that "unknown" switch was accidentally bumped off.
When you use the normal switch or tell the computer to shut off, it is
still drawing power.
Not so on MOST laptops, which have a real OFF as well as a standby
position. - but the laptop power supply still draws power if it is
plugged in. NO power to any ports or peripherals though when turned
On Fri, 07 May 2010 20:04:06 -0500, " email@example.com"
does not keep anything turned on - nothing is powered up when the
system is turned off - the battery simply provides voltage to the
"dead" side of the switch, which activates the solid state version of
a relay to power up the system when you push the switch.
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