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  1. donkey

    Key Finder

    ok a few things to consider on this. first and foremost is power. check the power consumption of a bluetooth device.on bluetooth 4.0 they got a new feature called BLE but I cannot find a cheap unit that uses this, so your keychain may have to be charged daily(or more often). second PROGRAMMING...
  2. donkey

    eBay Arduino Uno Clones

    arduino is for us newcomers. it has a USB interface which allows us to program and reprogram as we see fit. as you get the idea forr arduino and a rough understanding of how it works you can then create your own. if for example you come up with a brilliant idea for a R/C plane and wish to...
  3. donkey

    c programming

    my programming skills were limited to BASIC ad they're bout 20 years rusted. so in other words my skills are nought.
  4. donkey

    What's with the 'Ads By Google' all the time now?

    I had this issue too for a while. since the reinstall on my compno issues. the worst part was certain words had "links" in them. they took me to some very unsavoury sites.
  5. donkey

    Adding sdcard slot to an amp

    to make this easier you could find an mp3 player (or a little player playing the format you like) and hook that up to the line in port. http://dx.com/p/sd-card-mp3-player-4400?tc=AUD&gclid=CMezyubv6bMCFYhcpQodagQALQ that one has sd card as you requested and is $10au. all you need to do then...
  6. donkey

    Electronic whack-a-mole

    kris nice to see. throw me a schematic sometime. glad to see your project up and going
  7. 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
  8. donkey

    3x4 keypad and lcd interfacing with 8051

    if it isn't for homework then its for business. if its for business then you should pay for help provided.... well thats my thought.
  9. donkey

    9v dc to 9v ac conversion

    6 C cells should be providing closer to 10volts on a good charge not 9 if my very inaccurate calculations are right. so I don't think its volts or current but as he stated there is something that branches of before the rectifier. I am at a loss as to what but its kinda interesting me
  10. donkey

    9v dc to 9v ac conversion

    cj if he connects DC straight up to the rectifier it won't harm it will it? I don't see why bypassing the rectifier will matter except for maybe a little drop in voltage
  11. donkey

    Hello, Welcome! (Introduce yourself)

    a great project for beginners is making an LED light up without blowing it. it teaches both the direction of electrons and also shows how to manipulate current through a resistor (or else the LED blows) then add a switch for on/ off, the add more and more. the basics are far from exciting but...
  12. donkey

    DIY Electronics

    on top of what harald has said I can offer another solution andyou can try itlater but there are motor speed controllers out there. haralds suggestion is by far the quickest way but has a side effect of generating heat (at AA battery level and in short timed bursts it shouldn't be a problem though)
  13. donkey

    Hate to ask

    have you seen our for sale wanted section?
  14. donkey

    Help with reading schematic

    https://www.electronicspoint.com/help-leds-t253822p2.html is the schematic the one coca cola provided in the second last post on this thread? if so we can go over it real quick. if its from another link please provide it and we can show you every piece. if it is from cc's post then the...
  15. donkey

    PWM fan speed controller.

    the 3rd pin is usually there to calculate rpm so rather than an input it outputs 1 pulse every rotation.
  16. donkey

    Simple bike generator - help!

    to put things simply a bike generator is a GOOD idea for renwing enrgy but not at high consumption. getting a generator is best but you need fuel and in disaster areas that is hard to get.... unless you make biodiesel which is a whole other thing. if its just normal blackouts for a few hours...
  17. donkey

    Simple bike generator - help!

    ok first of all find out what your fridge operates at. find inverter to match. find a battery to suit then look at the alternator/ dynamo a standard car alternator can take up to 200 rpm before it starts producing adequate voltage to restore power. now the battery needs to have enough...
  18. donkey

    There goes the neighborhood

    I have seen these, the problem is the magnet, they are getting more expensive. but you can still make one for under $50 and buy one for about $40 as for excerise bikes... I have a running joke with a friend who is a primary school teacher, put the kids on giant mouse wheels and hook them up...
  19. donkey

    Wireless Remote

    ok wifi is ALL softare, any smartphone can be hooked up to it. from what I see the beaglebone is like a raspberry pi except slightly better. just a computer in reality. if you are using that for the recording device and it handles it fine then software is the key here. if you are using...
  20. donkey

    Boot iPhone 4 without battery

    I know on android there is an app called samsung KIES that allows you to connect to your phone through wifi. hopefully you can find a similiar item on the iphone or borrow someones battery
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