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31  Topics / Science and Measurement / Re: Current Measurement Arduino on: July 30, 2014, 02:48:45 pm
Is there anyway that I can measure the current running from the arduino to a breadboard without the use of a current sensor or any other external apparatus.
32  Using Arduino / Programming Questions / Re: Converting Analog values to 12bits on: July 30, 2014, 02:44:20 pm
I was wondering is there a way to smooth these steps out ?
Did you not read my last answer, or did you just not believe it?
33  Products / Arduino Due / Re: Due PWM Dimming Resolution Only 8 bit? on: July 30, 2014, 08:59:32 am
I did read that and I set analogWriteResolution() to 12 bits.
That only works on the two true A/D outputs, it does not refer to the PWM output as people have pointed out for many years is very badly named.
34  Using Arduino / Project Guidance / Re: Using RFID to read ID chips in cats and dogs on: July 30, 2014, 08:51:33 am
This is called multiflexing, right?
No. Multiplexing is putting several signals over one channel.

It is called encoding, and there are many different ways to do it.
You need to first find the type of tag and the encoding that it has.

You can make the coil the size of the entry so the cat actually goes through the coil.
35  Using Arduino / Project Guidance / Re: How to detect length of circuit? on: July 30, 2014, 08:11:14 am
what's the easiest way to detect how *long* a path of circuit is?
There is no easy way to do this. All the ways are hard.

Basically, if I wanted to put wire on, say, Jenga blocks, and then be able to tell how many jenga blocks are ontop of eachother, what would be a solution?
There would be no solution that you could do with an Arduino.
The best way is with time domain reflectometry:-
But not with a Uno. you can't.
36  Using Arduino / General Electronics / Re: Digital Ground/Analog Ground, Arduino Gets Stuck! on: July 30, 2014, 07:32:20 am
Should be placed as close as possible to the DC motor...  smiley-wink
Exactly wrong.
Can you explain why you think this is wrong?

Placing the capacitor some way off from the source of interference will allow more radiation off the leads between the motor and the capacitor.
37  Using Arduino / General Electronics / Re: How will moisture affect an Arduino? Rain? on: July 30, 2014, 07:28:21 am
To protect against humidity you can get spray on conformal coatings like this:-
38  Using Arduino / Audio / Re: Audio device similar to Rugged Audio Shield on: July 30, 2014, 06:49:47 am
is there something similar that could produce 24 bit audio with a sort of all-in-one accessible interface?
On an Arduino Uno then there is no way to get 24 bit audio.

You will have to go to a Due and even then I think you would have to build it yourself.
39  Using Arduino / Audio / Re: Analog Sensor to Sound Output on: July 30, 2014, 06:47:22 am
This uses an IR distance sensor like this one.
You attache it to an analogue input and take a reading.
Then use the map function to get it into the right range.
Then feed the output of the map function to the tone library.
40  Using Arduino / LEDs and Multiplexing / Re: is reverse Multiplexing possible? on: July 30, 2014, 06:38:51 am
use NI Multisim- resolution is very low from the screen print tho-  ill take another stab at it later
We are not interested at this stage in things like the power to the chips or the individual select lines. What we want to knw is what on earth you are on about.
Glad I'm not the only one who just doesn't get it!
I think no one knows what you mean and what you hope it will achieve. Your description is very abstract and muddled sounding.

Maybe it will help if you describe the over all project and what it is trying to do.
41  Using Arduino / General Electronics / Re: How to calculate the total power consumend by an Arduino circuit? on: July 30, 2014, 03:26:53 am
Or you could look in the data sheet and see how much each component takes.
42  Using Arduino / Sensors / Re: lightning trigger with a phototransistor on: July 30, 2014, 02:52:32 am
You say you have a photo transistor and yet you show a photo diode on that diagram? Which is it.
It is not bounce it is interference pickup.
43  Using Arduino / Sensors / Re: Does the ATMEGA328P have a multiplying DAC or just an ordinary DAC? on: July 30, 2014, 02:48:56 am
No you are not right. Reducing the Vref will give you the full 1023 range of readings over the voltage range up to the Vref. I have done this many times myself.
44  Using Arduino / LEDs and Multiplexing / Re: is reverse Multiplexing possible? on: July 30, 2014, 02:44:02 am
At this stage you need a block diagram of your concept. As Paul says that circuit simply does nothing.

Draw the multiplexers as physical switches.
45  Using Arduino / Programming Questions / Re: slowing down wire.h? on: July 29, 2014, 11:35:29 pm
Can you draw a schematic of your wiring please, it is hard to see where you are going wrong without.
You can do this sort of thing with a logic gate if you wire it correctly.
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