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1  Community / Bar Sport / Re: Who hasn't accidentally touched a mains voltage once or twice? on: Today at 04:09:33 pm
Crosh, I'm with you spark plugs are nasty, once grabbed just the cable near the boot, won't be doing that again  smiley-eek-blue
2  Using Arduino / General Electronics / Re: Stepup converter making squeaking noise on: Today at 09:06:34 am
Is it getting hot?

The next step is to look out power (volts x amps) on input and output. See how much efficiency you're getting.

Nope, no heat on the components. Just the squeaking noise.

Am I visible?
3  Using Arduino / General Electronics / Re: Stepup converter making squeaking noise on: Today at 02:30:03 am
The squeeking noise is coming from one of the inductors, try pressing your finger down on each of the inductors to see if the whining stops...
4  Using Arduino / Project Guidance / Re: need programming help on: Today at 02:15:02 am
Ah I understand now...

http://arduino.cc/en/Tutorial/ReadAnalogVoltage


The A is redundant then
5  Using Arduino / Project Guidance / Re: need programming help on: Today at 01:51:19 am
int potPin = 2;    // select the analog input pin for the potentiometer


Pin 2 is not an analog pin though? analogRead requires A0, A1 etc.
6  Using Arduino / Project Guidance / Re: Enter text and passwords for me on: Today at 01:48:08 am
Arduino leonardo or similar will do it easy enough ...

Another method is v-usb an atmega328p to emulate a hid/keyboard, storing the passwords in the eeprom...
7  Community / Bar Sport / Re: Arduino vs Netduino on: Today at 01:40:53 am
Maybe netduino vs arduino due is a more of a fair match...

I prefer the hardware side over software and your basic Arduino uno allows me to quickly test and interface with older 5v chips like the 4000 series, eg blink with delay with nice clean edges,  otherwise I'd have to create a 555 or logic oscillator circuit calculate the capacitor and resistor value... well I used to before arduino! Lol

Using arduino to test logic chips, I find an uno to be like a swiss army knife, if I wanted to cut down a tree I'd swap the swiss army knife for a chainsaw, a due or higher.
8  Community / Bar Sport / Re: Who hasn't accidentally touched a mains voltage once or twice? on: Today at 01:32:05 am
The other thousand people are not posting because they're dead smiley
9  Using Arduino / LEDs and Multiplexing / Re: LED drivers on: September 15, 2014, 05:44:17 pm
The neopixel rings use embedded IC's located inside the RGB chips, ws2811? Etc


If you want you can buy those chips or any other chips for driving arrays of leds, or even shift register, how bright, powerful are your LEDs? Current limiting will be tricky unless you have an ic which controlls the current of each LED
10  Community / Bar Sport / Re: Who hasn't accidentally touched a mains voltage once or twice? on: September 15, 2014, 05:30:06 pm
I learnt my lesson from an exposed 240vac plastic plug, the top of it had broken exposing a pin, I went to turn it off and my whole arm began to shake, never even touched it, hurt like hell...

I've only used a multimeter;  insulated screwdrivers etc since....  assuming it won't eventually kill you, chances are it will.
11  Community / Bar Sport / When did 'bugs' become 'glitches' on: September 14, 2014, 12:30:12 pm
I grew up with bugs, buggy code...

Now people use glitch, fixed the glitch... um a glitch is a few screwed up frames in an avi/mp4.

So if my code goes funny, am I fixing a bug or a glitch?
12  Using Arduino / Displays / Re: My LCD does not display characters.. on: September 14, 2014, 02:05:58 am
For less than 2 bucks.
. . .

For less than 2 bucks he may just exchange one set of problems for another.  Have you seen all the posts relating to getting I2C adapters to work?

Also - that board claims to do IIC/I2C/TWI/SPI.  Now the first three are all the same but does it really also do SPI?


Don

You solder it on, done....

The chip is just a shift register controlled via scl/sda ...  I've had no issues at all with them.
13  Using Arduino / General Electronics / Re: Mega voltage question on: September 13, 2014, 11:03:00 pm
650ma of current is not much...  how much current does each relay consume?  (Use a multimeter set to ohms and measure)

Sounds like the regulator is dropping out.
14  Using Arduino / Displays / Re: Large LED sign on: September 13, 2014, 10:58:31 pm
http://www.freetronics.com/collections/display/dmd

You can daisy chain these boards together for a huge display too..
15  Using Arduino / Displays / Re: My LCD does not display characters.. on: September 13, 2014, 10:51:57 pm
For less than 2 bucks.

http://m.ebay.com.au/itm/301251954157?nav=SEARCH
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