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  1. donkey

    stupid raspberry pi

    oh and to add insult to injury I finally formatted the sd card now windows won't work with it at all..
  2. donkey

    stupid raspberry pi

    so anyway linux does this nice thing where it partitions your drive into something that win 7 can't readily read. I read through a few posts and found a way (a freaking stupid way) to get rid of the issue..... then I clicked the wrong drive(actually 2 drive 2 terrabytes in total) and clicked...
  3. donkey

    Matrix circuit for Keypads

    yeah i know that but is it worth the effort? lol I am trying to get this freaking sd card fixed at the same time and no go.. anyway I hijacked a threadwhich I hate doing I will move this to off topics
  4. donkey

    Matrix circuit for Keypads

    ok coca let me put it this way, while trying to reformat an sd card for my computer I formatted the wrong drive and lost 2 terrabytes of info..... and to top that off when I got the thing formattedsomethingwentwrong andnowI cant find the sdcard.... can you tell my mind is kinda not with it...
  5. donkey

    Matrix circuit for Keypads

    ok.... that doesn't help I will figure it out eventually but thanks coca for putting me on the path to find out how to do it
  6. donkey

    Matrix circuit for Keypads

    hey kris why woldn't the 1 key need an I/O pin? every switch needs 2 connections, 1 ground and 1 other. if button 1 doesn't have a ground then how does it work? just trying to figure this out in my head thats all I just can't see it having less than 5 ifin a single row
  7. donkey

    potentiometer find

    in first pic it is labelled R2 10k ohm with a big red arrow to it in second pic it is labelled p1 5k ohm and p2 10kohm
  8. donkey

    capacitors as batteries?

    ok cool all except one point Q=V*C could you be so kind as to define eachletter for me. c is amp seconds i guess v=volts I guess and q is how long it will take for the item to discharge? the question I have is how to calculate farad to ah... unless q is farad...
  9. donkey

    capacitors as batteries?

    ok I will make the first question very simple but there are heaps more. if i was to use a cap as a battery do I need a special circuit? second is how the discharge is calculated. I know in a battery you use the Mah rating but how do you get that from a cap? 3rd if I use a 1.5volt power source...
  10. donkey

    Adding a timer to a siren

    how long you want it to go for? i got an old alarm circuit that has only 2 ways of disabling it, put a key in and turn it of or unplug its power (I put it in a tin and glued it close so getting to the battery would be kinda hard) oh also what other features you don't want? you need to be very...
  11. donkey

    Change button battery calculator to AA power?

    I agree with steve first and foremost. its ALOT easier to just leave it how it is and buy 1 (or 3 in your case) batteries every few years. anyway, why the heck would you put a resistor on it? most (not all) devices have their own in built current limiter or to put it easy they only draw what...
  12. donkey

    GPS Transmitter

    ok I am lost, this is a burglar alarm with gps? what is the gps for exactly? also the burglar alarm part is very common thing for micros as is gsm modules. the only thing I am hoping that this isn't going to do is directly contact the police giving them an automated message cos if the system...
  13. donkey

    Monitor in Desktop

    http://www.manualowl.com/m/Samsung/171V/Manual/143576 has the manual for ya I saw the cord seems like an IEC chord, if all you want is to use 1 power cord for your desktop and screen http://www.tnw.co.za/powerd2-1.html this might help also if you find some PSU's they actually had an IEC out...
  14. donkey

    lockable knobs

    you can do it with a drill and glue ( I would go heat gun though) and a saw if you use my approach. we did this to my brothers amp when our nephew started crawling, something bout kids finding the ONLY thing that they can reach and playing with it. it worked for a good few years until the...
  15. donkey

    nimh charger

    yeah I got an idea on the setup but kris and I are discusiing a few things, like if I have the one panel (its 2 panels 200watt each) how can I charge the SLA batteries that I introduce daily? so letssay I have 3 batteries from inside the house that need charging, all will have different...
  16. donkey

    nimh charger

    lol well my kids are 17 and 19 and if I see either with a candle, lighter, matches or anything else flammable I have apowder fire extinguisher to use on them..... I mean the fire.... yes the fire
  17. donkey

    nimh charger

    mark I got kids that have no idea about turning of things like power hungry old plasma TV's. I am going to be giving thema battery powered lamp each and removing their lights... I am mean but I figure its a great way for them to learn to turn things off to save electricity. if they leave it on...
  18. donkey

    nimh charger

    what about NIcd? are they any easier to charge? The only reason I am building my own is I am making a few battery powered lamps that will be charged via solar and I don't want to have to unplug and replug the items in and out
  19. donkey

    nimh charger

    Heys guys stupid question is charging a nimh battery as simple as supplying a voltage? or is there a circuit that someone has? the power packs will be about 4.8volts and charging them will have to be unsupervised so a cut off wold be nice. I will be charging it from a 12 volt solar array with...
  20. donkey

    do I need a circuit?

    harald its working tysm my friend
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