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  1. donkey

    Basic Electrical Work

    cd drive I think he realised that a few posts back. The big thing is that you have 3 diodes. now having one from solar cell to battery is ok, but the rest of the circuit is DC so you shouldn't need the others.
  2. donkey

    Basic Electrical Work

    nice. just one question, why did you not use a dpdt? you want to turn of the led and circuit at once, the LED will be an indicator showing the circuit is active and the battery has some charge so having it on at the same time as the regulator might be a good idea.
  3. donkey

    Ethernet camera less wires = want

    what voltage is ethernet? the only thing I thought would be the issue is making the camera run on that voltage.
  4. donkey

    Basic Electrical Work

    put a switch in there. it will stop the battery being on when its not needed. now comes the fun part. Ideally you want to discharge the battery bout once a month. get it as low as you can and then do a full recharge. on another note have you tried hand dynamos? I see alot of people using...
  5. donkey

    Anti shoplifting equipment

    yup totally agree. thats where experienced door people come in. you know when to push the subject and when to leave it alone. you also know when to go look at the footage for proof. the slander thing is not the best, NEVER EVER accuse anyone of stealing, instead inform them that upon entry...
  6. donkey

    Basic Electrical Work

    it is possible... but you would want it to charge slightly above the battery's rating. and to avoid backflow you would need a diode which could drop the charge by about 1volt. 2 things you should put in diode and slightly higher voltage then actually needed
  7. donkey

    Ethernet camera less wires = want

    to keep it very simple show us model numbers. the likely hood of this being doable is high. the likely hood of being able to do it without outside help is small, is this hooked up to a computer or does it use the ethernet cable and connect to a standard tv?
  8. donkey

    Anti shoplifting equipment

    with regards to coca colas comment: heck yeah there is alot of crap involved. a perfect example is if someone steals from shop A and escapes but the door sensor at shop B goes of and he/she is caught, even though the tag is still on the item and you can assume theft, you cannot prove it was...
  9. donkey

    Anti shoplifting equipment

    working in security I can tell you this. security is only as good as the staff. if you have for example a problem with gum going missing then it would be better to put cameras up. the reason for this is that it takes way too much time to put a magnetic strip on each of the packets. if...
  10. donkey

    my new astro toy

    get well soon.
  11. donkey

    my new astro toy

    its been a while... where are new pics? if you get anything around mars or venus I would love to see them
  12. donkey

    Circuitry design

    If I goto japan I won't expect them to speak english, or if I goto serbia I won't expect it. But when you enter a predominantly speaking culture (including this forum) is it not respectful to adhere to the majority not the minority? a forum is about provoking a stimulating chat. as a point of...
  13. donkey

    converting a dvd recorder to record to pc

    my computer guy tells me that tv tuner cards should be disconnected..... don't know why. if you are really after recording tv http://www.ebay.com.au/itm/USB-Record-VCR-VHS-Video-PC-S-video-AV-DVD-Easy-CAP-/321005731922?pt=AU_Components&hash=item4abd6ec052 and use a set top box or the av out...
  14. donkey

    FM Transmitter aka Spy Bug

    what do you mean by higher? why would you want a special reciever for it? this defeats the purpose of being an fm bug, it then turns into a super secret bug with special reciever possibly using the fm bandwidth. anyway if you are doing what I think you are then try a walkie talkie. if this...
  15. donkey

    Simple wheelchair motor controller

    well in that case I would look at going over to steam engine controlled or an old whipper snipper engine. it sounds stupid but after EMP steam engines will still work. petrol engines will need new components.. but hey there are options
  16. donkey

    Simple wheelchair motor controller

    would the batteries be affected by emp? and don't motors themselves generate a small (very small from memory) magnetic field? in fact I think most things generate em fields. I just can't think of the last time it affected me, I live in australia and we might have different regulations about...
  17. donkey

    Simple wheelchair motor controller

    the chances of emp affecting are really that high?
  18. donkey

    I'm new to electronics...

    there are many areas to learn. the tutorial section on this site is great cos after reading it you can ask us to explain parts you don't understand. there are heaps of books. the best idea for learning in my opinion is to start making circuit and figure out what is happening. take an LED for...
  19. donkey

    Electronic Parts [Explained] pls..

    have you had a chance to look over the tutorial section in this site? the list of components used is extensive and in each circuit they can have different uses. a capacitor is a great example, in alot of cases it stores energy, but in AC it is used to filter out DC signals allowing AC to pass...
  20. donkey

    amp and Volt meter

    thanks for the advice. I was worried I would need to modify this circuit alot. the only addition to this circuit will be a 2.4 ghz tranciever but if I can get this working I can then do the other side.
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