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571  Using Arduino / Programming Questions / Re: Sound Controlled lights on: January 08, 2014, 09:32:44 pm
Quote
i am not new to arduino  

Don't take this the wrong way but with only 6 posts on the Arduino forum it is hard to believe the above  statement.

Don't take this personally but what has post count have to do with experience?
572  Community / Bar Sport / any android java programmers here? on: January 08, 2014, 09:00:45 pm
I signed up to a java forum but no reply...

Basically I'm using the async threading class, the async is called onCreate then executed it works but as soon as the app loses focus and the socket seems to be killed.

Anyone know how to restart the thread when the app is brought back into focus? (Ie onStop) obviously when the app is destroyed and run again it works..

I'll jump on the desktop and post the code...

Thanks!

http://www.java-forums.org/new-java/84693-how-re-run-thread-sockets-involved.html

573  Using Arduino / Programming Questions / Re: How to exit loops on: January 08, 2014, 08:54:56 pm
http://arduino.cc/en/Reference/Break
574  Using Arduino / General Electronics / Re: Sharing Voltage/Current on: January 08, 2014, 07:18:53 pm
You should be fine with what you plan (providing there's no more heating elements)
575  Community / Bar Sport / Re: Intercepting *legally* radio communications on: January 08, 2014, 07:14:47 pm
Hmmm...

Not totally 100รท sure about this but.... I came across a video on youtube which shows you how to hack old radios by prying apart the coiled induction coils (1 or 2 of them)  and allows the tuned circuit to pick up bands like Air Traffic...

Maybe this could be used to listen in on them.


All you need is an old radio.
576  Using Arduino / Project Guidance / Re: Turn ON/OFF Battery Powered Toy with Pushbutton on: January 08, 2014, 04:49:35 am
The toy consumes 1.0A current.  I just want to control power to the toy. No sleep mode.

That's a fair amount of power...

577  Using Arduino / General Electronics / Re: Info about LED and resistor ARDUINO UNO on: January 08, 2014, 04:46:33 am

Quote

Ok thanks guys. The pull-down resistor should be required by the Arduino's pins, in order to reduce flickering, in that way if I=0 you will get a LOW value on such pin, otherwise you can get fuzzy and unbalanced values.

Do u agree?

Huh? A fuzzy led glow?

You talking about reading the value from an  led?

578  Using Arduino / Project Guidance / Re: Learning about Arduino & Electronics on: January 08, 2014, 12:14:52 am
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/ohmlaw.html
579  Using Arduino / Project Guidance / Re: Learning about Arduino & Electronics on: January 07, 2014, 11:28:02 pm
Ok..

Start with Ohms law, this will teach you how to control current and voltage. Then you'll understand how transistor gain works or move straight onto fets.

But ohms law is critical to designing any circuit.
580  Using Arduino / General Electronics / Re: Fast circuit breakers on: January 07, 2014, 11:23:56 pm

Nice.... I'll stick to a polyfuse for now.

I guess a simple ntc thermistor could also be used..
581  Using Arduino / Networking, Protocols, and Devices / Re: FM modulation device on: January 07, 2014, 11:05:47 pm
http://m.ebay.com.au/itm/201002484579?nav=SEARCH&sbk=1

One day I'm going to use one of these on an  antenna  and drive off seeing how far it will go ..
582  Using Arduino / General Electronics / Re: Measuring resistance of LED on: January 07, 2014, 10:59:35 pm
You can safely use a 20vdc power supply to an led without a resistor...

Providing .....

1. there's no stored capacitance.
2.  The 20v power supply is rated 20ma  smiley-cool

583  Using Arduino / Project Guidance / Re: tic tic tic or how to get low Hz (but precisely) on: January 07, 2014, 10:54:39 pm
If you don't mind not using Arduino you could use a gate osccilator and a crystal then use that as an interrupt for Arduino or divide the clock eg a 4017 or any other ic counter.

584  Using Arduino / Project Guidance / Re: Learning about Arduino & Electronics on: January 07, 2014, 10:52:09 pm
Any electronics books, sites will be fine...

How about you give us a starting point, transistors, triacs, latching circuits, scrs, fets list goes on so what are you interested in...
585  Using Arduino / General Electronics / Re: Fast circuit breakers on: January 07, 2014, 09:26:53 pm
Well I was not sure..

I've seen thermal fuses, regular fuses, em fuses, polyfuses...

Ughhh I don't like fuses lol
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