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  1. donkey

    forward and reverse variable motor circuit

    thanks duke but am after a design.
  2. donkey

    forward and reverse variable motor circuit

    hey guys, am making a r/c to make life easy to start with it'll be wired just to get the thing working, I'll go wireless later. the design is for a tank. i was looking at making each side independant but i want forward and reverse, and I want to control speed. I was hoping rather than having a...
  3. donkey

    Help with motor circuit design...

    I am unsure if in the UK you guys have the same setup as here in Australia, but we can order a manual for cars to be lent through our library. you may get lucky enough to find information on this pack and how it works and what resistance values to look for. if you don't want to spend the 25quid...
  4. donkey

    LED Lighting Project

    there are 12v edison screw lights, but incandesent bulbs chew more power than led's typically as for which type, depends on a myriad of things, like how bright? how many? do you want them coloured or plain white? if its for camping you can grab a cigarette lighter plug to hook up to the...
  5. donkey

    Combining a radar detector and smartphone with 1 set of headphones.

    well my theory is that if socket A was primary and played continuously. if socket b recieved a signal it would then be broadcast. i got the idea in my mind but no idea how to construct it. but the prinicple would be the same as the first one in this thread. I have even heard people saying they...
  6. donkey

    Combining a radar detector and smartphone with 1 set of headphones.

    I have been thinking about a similiar idea, using an mp3 or similiar device as primary but when the cb radio cuts in i want the mp3 to cut out and then hear the cb broadcast clearly, all automated of course. nothing yet more than an idea
  7. donkey

    Wiring a USB Fan

    i had a chord for my usb 3g modem that had 2 USB a plugs and a mini usb, the information in the booklet said that extra plug was used to provide extra power, I am assuming that means current right?
  8. donkey

    Server Maintenance

    how did it go?
  9. donkey

    3d glasses

    yeah i doubt we'll see holograms anytime soon, if we do the miss universe contests will get a HEAP more viewers. also I wanna see what OLED's will do for us, it would be funny if you needed a "green thumb" to keep your tv working lol
  10. donkey

    Wiring a USB Fan

    just a quick note on this, you COULD do all of that hard work and then try to configure the air flow to be just right, or you could simply type "ps3 fan" into google and buy a product prebuilt for around $15. just a thought
  11. donkey

    Air Plane Crashes (Pilot Error)

    the problem is in this day and age, computers crash, solenoids freeze, the list goes on. air travel will never be 100% safe but i know from experience that maintaining a computer system essential to the safety of a site means doing the bare minimum. train the pilots, teach them the same way...
  12. donkey

    Air Plane Crashes (Pilot Error)

    as always making something run by a computer runs into a problem. there are times when yes pilots cause an error, but there are times when the istruments are wrong too. take for example a phone screwing up the planes instruments, I would hate for the pilot to have to locate an override switch...
  13. donkey

    Unknown LED symbol

    i have seen something simliar but not that exact picture. the "N" with an arrow wasn't connected to the "O" of the diode though... in fact there was no "O" around it. this was in a kit for kids many years ago. and in that kit the symbol was a simple diode. hope that helps...
  14. donkey

    Simple circuit advice

    why not use a spdt switch centre off. if the alarm system is faulty and the relay is locked on then you can just switch it to off until the alarm is fixed.
  15. donkey

    Just throwing out an idea......

    I like both these ideas....... you guys work on it, I will market the idea lol. oh and alfa88 if you can design the ghostbuster backpack i could market that for you too lol
  16. donkey

    trying to build a home made night vision camera

    http://www.dealextreme.com/p/60-led-infrared-security-camera-floodlight-white-41096 this kit is already assembled if you want to use it. I also found this link which may help you further http://www.haydnallbutt.com.au/2008/11/25/how-to-assemble-your-own-140-led-infrared-light-source-part-1/...
  17. donkey

    Hello to all

    hey jason, just a quick hi and also, you said you didn't know enough to make a contribution yet, well I reckon I have to be the noobiest guy on here and still when I know something I let people know. I figure it may save the hard questions for the higher ups.... and hopefully the higher ups can...
  18. donkey

    Can anybody help me?

    ashique there are heaps of websites that show the basics, thousands of books ("Art of Electronics" was recommended to me) and then whenever you get stuck on something there is a great part of this site labelled "homework" so if you want to know how to figure something out they will show you...
  19. donkey

    Buy microprocessor and microcontroller

    goto google. google is your friend. search for electronic stores around you, whenever i buy I like seeing the product, because there are some online places that have no return policy and they can take for ever to deliver. Another thing you need is a way to program you microcontroller...
  20. donkey

    Thief detector alarm circuit

    working in security I can tell you right now, there are heaps of ways to detect a thief. the problem is as shrtmd said, we need more info. a short list of items you can use to detect people are pressure pads, PIR, reed switches, camera's, vibration detection, sound detection.... and these are...
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