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Logitech K750 Wireless Solar Keyboard User Review

Discussion in 'General Hardware' started by morpha, Jan 14, 2011.

  1. morpha

    morpha New Member

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    I bought this keyboard despite my hatred of half-height key's (i like to pound my key's when I type.) Its replacing an Old Logitech RF keyboard and Mouse set that I am sick off. (stupid large receiver, stupid batteries).

    I am going to gloss over some information that you will have read in every other review on the tubes...also its pretty rushed cause I got to catch a train in an hour...Here is my thoughts for you all....

    [​IMG]

    FEATURES:
    • Chicklet Keys (Laptop size, rubber dome, rounded corners and slightly indented)
    • Unifying Receiver.
    • 1/3rd of an Inch thick (about 8mm)
    • Enviromentaly Friendly Packaging (seriously)
    • Solar panels can charge from man-made light and natural light


    Packaging and Contents

    This product does not come with any driver disk OR instruction manual. It does come with some legal and safety information printed on the inside of the case and a picture diagram of how to setup it (all of 3 steps). This is supposed to be environmentally friendly, as little plastic as possible, no wasted paper etc.

    Having to CUT open the box to read this could cause trouble if you wanted to return the keyboard or needed to send it off on warranty.
    [​IMG]
    [​IMG]

    The information printed in the cover made my raise an eyebrow. Its maximum rated operating temperature is 40 degrees Celcius (104 farenheight). I dont know about America, But Australian summers routinely get to 40 and above.
    Aside from that there is this radiation warning on there [2]... so much for environmentally friendly.
    [​IMG]

    The keyboard itself has plastic over it to prevent scratches on the backplate and panels while in transit. The back of the keyboard is shiny while the keys are matte black. So finger prints will be an issue. Which is why they included a microfiber cloth! (yay another one, I got one with my z-10's too)

    Unifying Receiver: As we already know the Unifying receiver is a Logitech proprietary variant of Blutooth. It can have upto 6 devices connected to a single receiver, and it uses AES encryption to prevent people 'spying' on the data. I think the idea is awesome, but its a shame that Logitech dont have any gaming headsets that use the Unifying Receiver yet.

    Column 1 Column 2 Column 3
    0 Distance From Receiver Stuff in Between Comments
    1 10cm (~3.5 in) nothing + LOS perfect on desk next to case
    2 1 meter (~3 feet) 1cm (~1/3 in) thick wood perfect
    3 3 meters nothing + LOS perfect from my bed.
    4 5 meters nothing + LOS perfect from my bedroom door
    5 6 meters bedroom wall worked perfectly
    6 8 meters bedroom wall It received the middle of the sentance but not the beginning or end.


    It seems to work fine so long as it has line of sight, and at close range even with stuff in between, SO Opperating a computer within the same room should be A-OK. Once I got down the hallway with the wall in between it was cutting in and out.
    Its worth nothing that the receiver was not covered from the room though, so there nothing blocking it. (you can see the setup in the last image)

    The keyboard came with a USB 'spacer' so that it sticks out a little from a computer case in-case the case blocks the signal...
    [​IMG]

    Size Comparison
    Other Keyboards are Logitech DiNovo Edge and Logitech EX110.

    The K750 is the smallest of the three. Even smaller than the already sleek Dinovo. The low height could be attributed to the lack of a battery case. This keyboard uses a Single watch battery for its internal power when in the dark. (like the ones for your BIOS). This has a little hatch on the side of the keyboard and can be replaced if needed.

    Honestly though, despite its size is was surprised by its weight. It feels like its made from a solid chunk of steel. Its heavier than the diNovo and WAY heavier than the plastic EX110.

    [​IMG]
    [​IMG]
    [​IMG]

    Installation
    I plugged in the receiver to a computer with internet. Drivers were installed and it worked. Wonderfully easy. The computer wanted a reboot and after doing so Setpoint automaticaly installed the Solar meter app for the keyboard.

    Supposedly the keyboard can be used without the need for driver installation. But I wonder. If you plugged this into a computer without the internet or a windows 98 machine... How would you install drivers? It doesnt come with a driver disk.

    How does it feel in use?
    [​IMG]

    Ive been writing this review and posting on this forum with the keyboard. And with no more error than my old keyboard. The keys are well spaced and not all cramped together like a laptop keyboard. They are infact the normal size for keys.

    SOLAR STUFF
    In the above picture is a button than when pressed will light one of two leds. The top one glows green if there is enough light. The bottom glows red if there isn't enough light and the keyboard is running on batteries. If the solar app is installed it will launch and display detailed information about the amount of LIGHT being received and the battery levels.

    There is also an off switch if you are worried. Though Logitech have stated that it will run in darkness for 3 months.

    To give this table some meaning. LUX is the rating that is given to the amount of sun the keyboard is getting. The App has a pedometer that shows that anything under 35Lux gives a sad face... and anything above 150Lux is good. In general use you dont get bellow 100lux. But see the table for more detail
    Column 1 Column 2 Column 3
    0 Light Sources LUX Comments
    1 Indirect light from window hitting single panel* + 22" monitor 83 Lux ...
    2 indirect light hitting both panels + 22" monitor 130 Lux Just by having the indirect light hit both panels.
    3 indirect light hitting both panels + 22" monitor MAX LUX (500) moving it directly onto the window sill...
    4 Indirect light from window hitting single panel* + 22" monitor + 5watt power-saving lightglobe 90 Lux ...
    5 Window blinds closed + 22" monitor, NO LIGHTS 10 Lux just from a small crack in the window blinds.
    6 Window blinds closed + 22" monitor, 5watt power-saving globe 17 Lux small crack in the window blinds.
    7 *** *** ***

    * This was done at 7pm during SUNSET.
    *** In the morning I will do more tests with stronger light.. I HAVE noticed a big difference in power gain during the afternoon.

    [​IMG]

    I can say with relative confidence that charging will never be a problem for this keyboard unless you live underground. In the dim conditions shown above and 1 solar panel covered by shadow it still received enough light to not need batteries. Other reviews have said it lasted approx 1 week in the dark under heavy use... So if you let it get some light each morning you'll never need to replace the batteries.

    I found it amusing that even the blue leds from my external hdd enclosure was giving it light. I could never get a decent number... The rating always 'jiggled' whenever the LED's were on.
    Last edited: Jan 17, 2011
    AlienIsGOD says thanks.
  2. meran New Member

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    good review man +10
    1st question hmmm wireless range since i have crappy gigabyte if i put the transmitter under the table it wont work right some times
    2nd question what's the name of ur lovely cat since i lost my 2 cats in car acciedent:cry: [stupid cats]
  3. Mussels

    Mussels Moderprator Staff Member

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    cats name is pogo.

    hairy knuckles and dinovo edge belong to me :p

    i dont think he'd like me going into his room to steal the receiver to check the range for you, however.
  4. morpha

    morpha New Member

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    BUMP added more detail. SOrry you all had to wait (stupid trains)
  5. FreedomEclipse

    FreedomEclipse ~Technological Technocrat~

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    heres a rather expensive solution....Buy another K750 laptop so you can have one charging by the window while the other is in use.

    But i wonder how long it would last on one full charge -- and if the battery inside degrades over time like standard rechargable batteries do - other then that, good review

    It would be total pwnage if they put LEDs into the keyboard like Logitechs illuminated keyboard (which I am currently using - But I have to say I do miss the full media features of my MX3000 K&M set but after a while you do get used to not having them)
  6. morpha

    morpha New Member

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    I mentioned that you can replace the battery that this keyboard uses. Its a $4 3.0volt CMOS battery.

    Well im assuming it is, I cant see the exact model number for the battery cause logitech put a damn sticker over it.

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