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  1. 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...
  2. 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...
  3. donkey

    a little fun pic from lord of the rings

    I saw this and it just tickles my fancy
  4. donkey

    do I need a circuit?

    http://www.ebay.com.au/itm/120935947271?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 i got 3 of these little suckers and I washoping there would be a nice big label saying voltage in / voltage out.... well there is but the Vout has 3 poles..... then I also saw this component used with a...
  5. donkey

    peltier devices

    ok there is alot of people that say these are good alotsaying they are not. but anyway I have a grand scheme of making a very small air con. I have some of the parts required and some on order. but I will try to get to the questions soon. first of all I got me a stock standard 80watts peltier...
  6. donkey

    get it right

    hey guys this is an observation again. just something I notice from time to time. I in no way wish to do anything more than point this out. So why do people have half an idea and try pushing an illadvised/ un thought out scheme constantly? I have in the last 2 weeks found it getting slowly...
  7. donkey

    Laser module question

    http://www.ebay.com.au/itm/2-PCS-Mini-650nm-5mW-5V-Laser-Dot-Diode-Module-Head-For-Arduino-/251201655020?pt=LH_DefaultDomain_15&hash=item3a7cc910ec anyone got any idea about the resistor needed for this sucker? I am hoping to get it working of 4 AA batteries
  8. donkey

    tv head phones

    hey all. am after a schematic for a head phone system the idea is to use the audio out on the tv to get the sound then send this via a preset fm frequency (2 t.v.'s so need 2 seperate channels) hopefully on the AM or FM band. I have seen many projects for fm transmitter microphones but am...
  9. donkey

    old school gaming console connector

    the connector I am after is like the one above. It is used to slot the old cartridges into for gaming consoles. Just need the name of the connector so I can try to find a seller
  10. donkey

    c programming

    anyone able to help out finding a hand on approach to cprogramming designed around microcontroller programming? I see the basics but I want something easy to follow if there is something like that
  11. donkey

    amp and Volt meter

    hey guys the only reason I am posting here and not on the arduino forums is cos you guys actually respond. the project is a simple amp and voltmeter setup using arduino to monitor it. I don't want it to shut it down or anything just to tell me the amount of power left in the batteries. the...
  12. donkey

    definately off topic

    but had to put this up cos I am so excited http://www.timeanddate.com/countdown/to?iso=20121113T00&p0=47&msg=BLACK+OPS+2+BIATCHES&csz=1
  13. donkey

    3d imaging

    hey guys, I have been reading about 3d scanners and printers. I understand the printing can take days to occur. that is fine for me. the question I have is can anyone tell me how long it will take to scan an object? I was thinking of using a few cameras to speed the process. also is there a 3d...
  14. donkey

    what excites you

    Just today I got my hands on 2 raspberry pi's. these little suckers have been on my wishlist for 3months. today my arduino experiments open up to a whole new area. I can actually get a completely dedicated arduino setup using the Pi for gui and the harder tasks. with a few modifications I can...
  15. donkey

    the smartphone

    I didn't know if this was feedback or off topic, or just an idea that seems alot of people are overlooking. There seems to be a small movement for projects that are already out there. the best one is people wanting a camera hooked up to both a mobile/cell tower and to wifi...... we have this...
  16. donkey

    google it for me

    Guys this is not a rant it is an apology. I know alot of times (at least 4 that I can think of) I have asked for something that google has spit out in its top ten results. there are times when I stare at the information from some other sites and I know its english..... but I am positive its...
  17. donkey

    removing silicon

    this isn't electronics as such but I have acquired some fish tanks and they have dividers siliconed in place, I was looking at an easy way to remove the silicon to get the dividers out. any one got an idea?
  18. donkey

    solar powered battery charger

    hey guys I got one of those battery chargers that charge from aaa all the way through to 9volt. the issue I have with rechargeable batteries is the money I spend on electricity is less than buying new batteries all the time, but its still money. (thank you carbon tax its getting a bit more...
  19. donkey

    build it for me

    I am seeing this pop up alot on this forum of late. I have a great idea, you do all the work for me. we even had one guy tell us he had a great idea and was willing to pay someone to build it, but then never gave us even a vague idea on what the object was. I know you guys help out alot but...
  20. donkey

    hobby time

    OK so this has been taking some time but my mind has stuck. the base is easy as heck but I cannot find anything that will show me how to build the turret and get it to fire. I was thinking about destroying a nerf gun to get it to work but I was wondering if anyone had an easy method to do this...
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