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  1. donkey

    my daughter's science project

    what type of transmission you looking at? infared? or radio wave? if radio wave find an old rc car replace the motor with led's and a resistor and that'll work easily enough. infared.... well that one is outta my league atm.
  2. donkey

    solar workshop time

    hey guys i think I may have been mis understood here. I only want a small plant to charge batteries on my 5 days at work then on my two days off I will use it for about 3 hours per day to charge chordless drills etc, a fan and a few led lights. I was thinking about 50 a/h should more than cover...
  3. donkey

    solar workshop time

    well its time I got off my lazy backside and finally got into building my solar workshop. Before I start spewing forth details please note I am NOT a licensed electrician and am trying to minimise the use of one. In fact I hope to not need one except for plugging up my inverter but will see...
  4. donkey

    How to make a simple transmitter and reciever? Range > 100 meters.

    if you want a simple i press button on remote and items turn on i press button again and they turn off, then simply use one remote and all the same recievers. if you need to switch all on some of the time and some on the rest of the time then you need a special hookup. think of rc cars. if 2...
  5. donkey

    Is this possible ?

    there are already devices that do this. dunno if via bluetooth. I live in australia and there is a device here that is a simple on/off remote. changing that to a variable resistor for light dimming is cool but would only work on certain lights. a fluro for example would start flickering if...
  6. donkey

    Is this possible ?

    welcome the device seems SEEMS easy if you break it down. however I must point out "pairing" devices with bluetooth is one way to go but there are heaps of frequencies you can use. first of all a light dimmer or motor speed controller circuit would be a good start. then look at the way you want...
  7. donkey

    220v -110v Downstep converter Question!

    1 thing I have to ask is why not buy a europen chord for your xbox and Wii? they have the transformers on there so they will supply correct voltage, amperage and wattage. they also come with a small warranty.
  8. donkey

    USB Device

    is it for small objects or is this to turn things connected to mains power? the dvices are all out there just some of the ones described are not meant for, nor recommended on mains. I have intentions of using an eee pc one day to automate a few things in my "workshop" so please let me know...
  9. donkey

    mobile phones as security cameras

    I thought about all that. was hoping to give him news like just attach two wires at point a and b and you got a free camera. but oh well
  10. donkey

    mobile phones as security cameras

    this project is for a friend. he has found on ebay a bulk lot of old mobile phones (no info on models as yet) and he was wondering how hard it would be to use them as security cameras. all have bluetooth, and he was wondering if there was anyway to connect them to a hub. my theory is this...
  11. donkey

    Need help with circulation pump backup???

    why not use the australian pump (cos we rock) and just buy a converter? also available in australia... but you would find them in the US too also if you contact that supplier they may be able to put you onto an american powered version of this product also the design for the hookup would be...
  12. donkey

    Making it rain in an aquarium.

    I don't think this is about the pump or the delivery of water more the fact acroholic wants it to rain when the LED's simulate the thunder. I have an idea on how to do it. my idea is taking out one of the LED's and replacing it with a relay (you need to make a specific boards for this as some...
  13. donkey

    Solar Help

    it also depends on which usb you use. http://en.wikipedia.org/wiki/USB#Power offers some more info on current and voltage. also the battery you are using is it lead acid or another type? if its lead acid then you really shouldn't drain it to 0%.... actually I myself would not go below 80% but...
  14. donkey

    remote activation??? need help.

    if we get more details on the project we could possibly get better ideas too
  15. donkey

    Mystery IC T19

    i googled so8 aov and found this http://2.bp.blogspot.com/_js6wgtUcfdQ/R4A4Kf0aUsI/AAAAAAAABlw/WOtA5so8Sjs/s400/MUX_1-de-2.gif in amongst alot of unrelated pics. googling so8 a0v got me a few pics of ic's too. i found if you can't find a page with what you want click the images tab to see if...
  16. donkey

    Solar Help

    sorry just to note in the diagram I wrote regulator, I meant charge controller.
  17. donkey

    remote activation??? need help.

    wow 100meters on an infared signal... isn't there another way. also if it is infared do you have direct line of sight? in fact there are a few things that I would worry about with infared. if you got an old rc car(any toy with 2 options actually, e.g. forward back, up down etc) you could...
  18. donkey

    Solar Help

    research them yourself here. some offer great warranties but are monocrystalline(i am pretty sure i spelt the wrong). amorphious(another incorrect spelling i assume) and I prefer personally cause they charge in lower light. as for regulators they usually have a standard. batteries- deep...
  19. donkey

    Solar Help

    the way i see it is just hook solar to a charge controller, hook battery to charge controller, the buy a device that runs usb of 12volt batteries. http://imageshack.us/photo/my-images/97/solarz.png/ hope thatpic is helpful... and if anyone has any other ideas I would like to know them too.
  20. donkey

    How to Extend Digital Camera Battery's Life for 10+ Hours?

    this seems too small to add anything. a new case would be needed and then a bigger battery. thats the only way i can see it
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