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  1. donkey

    PWM

    so n the case of an eletric motor it turns it on to get initial movement then off and on keeping the speed at a low rate right?
  2. donkey

    modified sinewave ups

    welcome malik. what problems are you encountering? what schematic are you using ? we need details to provide better answers
  3. donkey

    PWM

    harald.... can you do me a favour and read my first post bout nose bleeds lol. maliks thanks for the hijack lol the reason i asked about pwm is arduino says it has pwm slots and that was suitable for driving motors forward/reverse and at different speeds. just trying to figure out why i...
  4. donkey

    Series AND parallel?

    just buy a rated charger and connect it. li-po batteries need a specific charger. DO NOT USE A CHARGER FOR NI-MH OR NICD. shows an example of what happens when you use the wrong charger. using a battery pack for arduino will provide 3.6v and a zener diode will drop that for you. or you can...
  5. donkey

    PWM

    so in essence its just giving less voltage to a device?
  6. donkey

    video and rf together

    there may still be a few av-rf converters out there that could add to the rf chord then all they have to do is switch to a channel as before. I am positive that the only work on analogue compatible tv's though
  7. donkey

    Series AND parallel?

    ok maybe I can help you out this way batteries you have are 1.5v (actually 1.2v for rechargeable) if you solder them together you get 2.4v not the 3v you require that is issue 1 issue 2 isn't about CAN you charge them in series, the answer to that simply put is yes. but not with the charger...
  8. donkey

    PWM

    can anyone define pwm in a way that won't make my nose bleed? if you can give an example too that would be awesome
  9. donkey

    Series AND parallel?

    wiring 4 AAA rechargeable batteries in series wil give you approximately 4.8v do the HAVE to be wired or can you just buy a battery case and swap them back and forth? yes the batteries do have to be in parrallel to charge as its try to charge 1.2v items, if you put them in series it'll be...
  10. donkey

    how can i find led specs

    what country you in? recycling parts is a good idea but in most countries you can pick up a pack of 100 LED's for cheap(depending on country that is) http://www.jaycar.com.au/productView.asp?ID=ZD1690&form=CAT2&SUBCATID=976#1 for example, these are all new. you may get one or 2 that are faulty...
  11. donkey

    how can i find led specs

    what type of LED did you buy? the issue is these days LED's come in several assortments. the pic I posted was for the generic LED which alot of us use in test phase. (I like other ones like ultra brights for personal reasons.... mostly I like blinding people) also did you get these LEDs from a...
  12. donkey

    how can i find led specs

    this might help with the anode, cathode thing too notice the anode is longer
  13. donkey

    a little luck

    woah, to add to luck, we have a curbside(kerbside) cleanup. my neighbour just put out a large peice of laminate. can anyone say new desk top??? all i need is someone to throw outa complete solar setup now and I will be stoked lmao
  14. donkey

    a little luck

    hey people. just started on my run of luck this week. I have been meaning to get a dedicated workshop for electronics projects. As some of you are aware I do security work. I found one site had lockers they were throwing out. awesome find and all it cost me was fuel to get them home. now I have...
  15. donkey

    LED tail lights.

    its odd but certain lights aren't technically legal here in australia. take for example HID. they are allowed on cars, but only if they came with them new. IF you convert them they are illegal. it is best to check legalities first, unless this is for offroad fun.
  16. donkey

    LED tail lights.

    http://www.jaycar.com.au/productResults.asp?whichpage=11&pagesize=10&keywords=&MID=4&CATID=88&form=CAT2#4 that website has some LED tailights. In their catalogue they also have LED H1, H3,H4,H7 lightsbut these parts do not appear on their online store for some reason. hope that is of some help
  17. donkey

    DC to AC converter

    an electric motor can act as a generator producing an AC voltage if required, it may be a simple alternative for you
  18. donkey

    Where to get started?

    if you read through our tutorial or others one thing I sure you will find is what I have found, the moderators on this site are awesome and willing to help out. they have alot of expertise, and can at least point you in a direction if not give you an answer if you have a question. They have...
  19. donkey

    minimising cb radio

    My boss has a question that I cannot adequately answer. Why can a mobile broadcast a few km to a tower and are so small but cb radio's have issues broadcasting 300metres indoors?
  20. donkey

    my daughters birthday

    I was on a roll though, she then asked for an apple ipad, i got an apple slice and put it on her eye, and told her she was weird..... lol
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