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1  Using Arduino / Installation & Troubleshooting / Re: Interesting FTDI issue on: July 21, 2014, 11:25:44 pm
Maybe you need to prune the Serial-port number thingamajig?

// Per.
2  Using Arduino / General Electronics / Re: ebay relay boards on: July 20, 2014, 08:16:24 pm
I would advice against that exactly board that is linked to. Look at the underside. There is under 2mm spacing between the high voltage and low voltage tracks. It doesn't take much dirt or moisture to break that path, and then your Arduino goes "live" and can kill you if you touch it.

Unfortunately, a lot of these "Arduino-compatible" products on eBay are made by people that have absolutely no understanding of good measures and safe practices. I hope no one is harmed by these badly made boards.

Another example of a board that is very dangerous is this: - The copper pour all over the board offers no isolation from the high voltage to low voltage side... crazy!

A much better approach is seen here - Here the designer actually knows about isolation, and had a piece of the PCB milled out, to isolate better:

// Per.
3  Using Arduino / General Electronics / Re: Do i need capacitors on: July 19, 2014, 11:26:49 am
Regarding capacitors on motors for noise-dampening, all you need to know is here:

// Per.
4  Using Arduino / General Electronics / Re: PWM 12V 150Amps output signal using arduino is it possible ???? on: July 19, 2014, 11:22:59 am
from car battery

And where do you think the Car battery get it's energy from? The Alternator.

In turn, the Alternator is driven by the Gasoline-engine.

In each conversion, there is energy loss.

It's impossible for the HHO system to work. The only way it would ever work, if Electrolysis gave you more energy, than you used to split the water in the first place.

// Per.
5  Using Arduino / General Electronics / Re: Do i need capacitors on: July 19, 2014, 07:41:23 am
Ahh, a battery-holder with 6 AA-cells. That is much, much better than a 9-volt block battery that we thought you were using.
Like this:

Actually, you could do yourself a favor. Only put 5 batteries in the holder, then you will not waste as much power in the voltage regulator on the Arduino, and your batteries will actually last longer! - Solder a wire across one position in the battery holder, or make a "dummy" battery out of a dowel wrapped in tinfoil, or whatever you can come up with.

// Per.
6  Using Arduino / General Electronics / Re: Grounding with shift register on: July 16, 2014, 06:04:22 am
It is not actually an Italian that is responsible for that tutorial.

I know, but. It's an italian that cease to respond to queries when we ask if we can fix the faulty guides...

It's just sad that newbies go to trust the guides from a seemingly credible source, but are let down by simple errors. This is the last thing you need as a newbie, to get taught the wrong way.

// Per.
7  Using Arduino / General Electronics / Re: Grounding with shift register on: July 15, 2014, 05:13:12 am
We've tried getting the Arduino-team to change many faulty guides over the years, but they are not interested in getting things fixed.

I guess it's just the italian mentality smiley-sad

// Per.
8  Using Arduino / Microcontrollers / Re: Please help. 3.3V usage. on: July 13, 2014, 09:53:55 am
It was getting kind of annoying having to edit avrdude.conf all the time because I have atmega328pu chips. Have to keep changing the signature from 0x1e 0x95 0x0F to 0x1e 0x95 0x14 and back. So I made a new boards.txt file and added something to avrdude.conf so I don't have to keep editing the files all the time. Now I have a PU version of any board that uses a 328p

You do know that "PU" is just a case denominator? The 328PU, MU, AU share the same internal piece of silicon.

The difference is when it's an 328xx or a 328Pxx.

// Per.
9  Using Arduino / Project Guidance / Re: Use Arduino Uno R3 to program Pro-Lite Truecolor 2 on: July 12, 2014, 01:03:17 pm
First result on google, looking for "Arduino Prolite"

// Per.
10  Using Arduino / Motors, Mechanics, and Power / Re: some question of lily pad on: July 12, 2014, 06:29:34 am
What is the question?

Try to explain your question a bit better.

// Per.
11  General Category / General Discussion / Re: PCB design on: July 12, 2014, 03:31:23 am

If you cannot express yourself in english, use your native langusge, maybe in one of the foreign forum sections.

// Per.
12  Using Arduino / Programming Questions / Re: Alternative IDE on: July 12, 2014, 03:27:43 am
I would suggest this:

It works wonders!

// Per.
13  Using Arduino / Programming Questions / Re: How to send MMS Using AT commands on: July 11, 2014, 04:55:41 pm

No one is going to reply to you, using your e-mail address. The Arduino Forum is not a bulletin board at the local supermarket.

How about you go looking at the documentation that Teltonika provides?

If all else fails, try this:

// Per.
14  Using Arduino / General Electronics / Re: 230V hakko FX-888D? on: July 11, 2014, 02:29:21 pm
50/60Hz difference is of no importance for the mains transformer.

So go ahead and purchase the soldering iron.

That cheap-ass voltage converter will/cannot change the frequency.

// Per.
15  Topics / Device Hacking / Re: Bluetooth headset hack on: July 10, 2014, 01:53:57 pm

Bluetooth-modules are a special kind of beasts. When selecting a module for your application, you buy the module, a license for a very special IDE. In this IDE you make a software stack that support what you want - Be it Serial, Audio, Keyboard, Mouse etc. and flash that in the module.

You cannot use this module for serial. PERIOD.

// Per.
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