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241  Using Arduino / General Electronics / Re: 5v relay and motor on: May 14, 2012, 06:23:50 pm
If what your saying is you hooked 8 volts to the arduino and are by passing the regulator.
If that's right you may of cooked it.
242  Using Arduino / General Electronics / Re: mosfet failure reasons? on: May 10, 2012, 10:13:27 pm
Sounds like you have shoot-through show your circuit. But its hard to say not seeing how you have the speaker hooked up. But you should be using a cap to feed the speaker.
243  Using Arduino / Project Guidance / Re: Door Lock on: April 27, 2012, 10:26:35 pm
You don't what to hold that latch open for a long time there not made for that.

Have a look at this it's basically the same thing led on door opens led off door is locked just use a fet to sink the power of the latch coil.
244  Using Arduino / General Electronics / Re: Snapped strip board, best way to fix? on: March 17, 2012, 07:56:09 pm
Use a sharp knife to score it on both sides like has been said your lungs will love you for that.

Any kind of grinding needs lots of ventilation and a mask these boards are made with glass fibers and when you grind it the dust will stay in you lungs which can't be good.   
245  Using Arduino / Installation & Troubleshooting / Re: pin 0 RX??????????? on: March 09, 2012, 11:18:34 pm
Pin 0 is tied to the USB 16U chips TX pin it would be High
246  Using Arduino / Project Guidance / Re: Good Ideas from talented indivudals on: March 09, 2012, 10:09:26 pm
This would be a simple fix let a spring hit the microswitch The spring would let you over tighten the cap and not break the microswitch.

And could easily  be setup to insure you have tighten the cap
247  Using Arduino / Installation & Troubleshooting / Re: My win7 computer won't recognize my uno on: February 18, 2012, 11:21:58 pm
he on the wrong com port
248  Using Arduino / Installation & Troubleshooting / Re: Smoke coming from UNO on: February 18, 2012, 11:51:46 am
It's easy to mess up we all do it just some lie about it. But if you fallow so simple rules you going to still have a usable mirocontroller in the end.

Never put power on till you are 100% sure you have the power lines right that's number one
and two always check the wiring a few times always.

Three always limit the power to a pin to big of a resistor not going to hurt to small and you'll see smoke.   
249  Using Arduino / Installation & Troubleshooting / Re: Smoke coming from UNO on: February 17, 2012, 05:40:43 pm
I can't believe any one would say the "design is very poor"  Come on here if you fixed this so you couldn't break it it wouldn't be able to do any thing good it would be in a bubble.

You don't put 12 volts on any pin and you don't try to sink or source more power then it can put out.

You wouldn't pull a Mack Truck with a 4 banger car would you if some thing went wrong it would run over you can't stop it.

Same thing here you pulled more power then it could supply and your Mack ran over it.

But the Op may be lucky and he just burned the power supply out by back feeding it  
250  Using Arduino / Installation & Troubleshooting / Re: UNO Driver not found for Windows 7 on: February 17, 2012, 05:16:07 pm
It works I'm running it on windows 7 64 bit

All i had to do was point it to where my arduino drivers are it used the the vista 64 bit setup to install the right thing
251  Development / Suggestions for the Arduino Project / Re: LiquidCrystal 4 bit mode initialization doesn't follow datasheet on: February 05, 2012, 02:14:12 am
There not using read write pin on the LCD so just to be on the safe side the delays are longer.

If you feel a shorter delay is better and it works use it. There are a lot of clones that need more delay.

It may work fine for you and my buggie LCD may not like it.
252  Using Arduino / Project Guidance / Re: About arduino duemilanove on: February 05, 2012, 02:04:39 am
It's adc is 5volt  and the only difference is how they connect to the pc the uno  uses a atmega16u2 for USB to serial and duemilanove uses a FT232RL and only has 5 volt power uno has 3.3 at 50ma and 5 volt
253  Using Arduino / Programming Questions / Re: Writing port pins as output on: January 31, 2012, 10:08:19 am
Thanks It was looking like that's the only way so Now I no thanks

254  Using Arduino / Programming Questions / Writing port pins as output on: January 31, 2012, 10:03:15 am
I've looked around but have not found if you can use this code

int powOn = 3;

void setup () {
pinMode(powOn, OUTPUT);
void loop () {
     powOn = 1  // Is this usable

// or should it just be done this way
digitalWrite(powON, HIGH);   // is this the only usable way

I guess what I'm asking is can you just set a pin high by using a 1 or do you have to use digitalWrite for
255  Using Arduino / Installation & Troubleshooting / Re: Will the arduino Uno adc burn if the input voltage is around 5.25V? on: January 27, 2012, 11:56:12 pm
He doesn't say if he using the pin as a I/O or analog   
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