Show Posts
Pages: 1 2 [3] 4 5 ... 579
31  Using Arduino / Project Guidance / Re: Nested interrupts using NOBLOCK on: April 13, 2014, 07:38:51 am
We haven't see any code yet and also don't know what you are trying to achieve, but it's pretty hard to think of a good reason to use "malloc" and "nested interrupts" in the same sentence.

Can you explain what you are trying to achieve, not how you think it should be done.

______
Rob
32  Using Arduino / General Electronics / Re: Shift registers - only good for LEDs? on: April 13, 2014, 07:34:06 am
PWM through a shift reg is possible, pretty inefficient but if you are really short of pins ok.

Quote
I have seen projects driving high powered LEDs through 595s.
Not without further amplification, or not for very long.

Quote
Unfortunately, it still doesn't answer my question !
I thought everyone had, what was the question again then?

______
Rob
33  Using Arduino / General Electronics / Re: Digital output interface (0 and 1) on: April 13, 2014, 07:28:42 am
Quote
I was thrown for  bit by the Analog println loop where as the digital println did not seem to loop...
Yep, gets me every time that one.

______
Rob
34  Using Arduino / Project Guidance / Re: Multi-node CAN bus: a progress report on: April 13, 2014, 06:49:06 am
You've certainly done a lot of work, well done.

______
Rob
35  Using Arduino / Project Guidance / Re: Determining If Relays Are Working, Programmatically on: April 12, 2014, 07:16:00 pm
Quote
If one is 12Vdc and the 0V then there's a problem
Doh, don't mind me, I've only had 2 cups of coffee and aren't fully up to speed yet smiley

In fact I used an XOR gate to do almost this exact function (detect a blown fuse) just recently.

______
Rob
36  Using Arduino / Project Guidance / Re: Determining If Relays Are Working, Programmatically on: April 12, 2014, 07:06:32 pm
Quote
analog inputs on each side of the relays and make a comparison between In and Out. Can anyone see any problems with that
Yes, if you are talking about the coil it doesn't tell you much at all, and if you are talking about the contacts you would never read the voltage drop as it will be uV probably.

It will depend on exactly what you are switching, using a spare contact pair is the easiest way but that's still not 100% as the other contacts may have a fault.

What are you switching?

______
Rob
37  Using Arduino / Project Guidance / Re: Automatic plant watering system on: April 12, 2014, 08:23:26 am
From a famous movie "What we got here is... failure to communicate." Sorry I sometimes forget what it's like to be a beginner at this stuff.

Listen to PeterH smiley

______
Rob
38  Using Arduino / Project Guidance / Re: Automatic plant watering system on: April 12, 2014, 08:13:05 am
How can there be any confusion, one side is for the mains, the other for a 12v pump, what is there not to understand? It's not even physically possible to do it the other way around.

If you can't find a socket for that 12v plug cut it off and connect the wires to the pump.

I have to ask Kando, how old are you? If you're just a kid ok, but if you are an adult I can't take any more smiley

______
Rob
39  Development / Other Hardware Development / Re: List of tools for surface mount work on: April 11, 2014, 10:10:33 pm
Those head-mounted magnifiers work well, and you can flip down more power when you need it as most of them have an extra lens or two on swivels/hinges.

______
Rob
40  Products / Arduino Due / Re: Arduino Due analogRead() repeats itself on: April 11, 2014, 04:52:08 pm
Quote
We chose the due for the reasons that it is a Cortex M-3 and it has a double precision floating point unit
Does it? First I've heard of it.

______
Rob
41  Development / Other Hardware Development / Re: List of tools for surface mount work on: April 10, 2014, 05:53:39 pm
+1 for the hot air rework station. "Rework" is a misnomer though, you can use them for the initial soldering of components.

______
Rob
42  Using Arduino / General Electronics / Re: LCD is not working: DOGM204-A on: April 10, 2014, 05:51:19 pm
Where does the LiquidCrystal_I2C library come from? Is it proven to work? Does Electronic Assembly have a forum to ask on?

______
Rob
43  Products / Arduino Due / Re: Anyone using CMSIS? How to get started? on: April 10, 2014, 05:45:14 pm
Isn't CMSIS just a heap of definitions for registers etc?

______
Rob
44  Using Arduino / Project Guidance / Re: Automatic plant watering system on: April 10, 2014, 07:30:54 am
No, you need to connect the DC plug to your motor, not the mains.

______
Rob
45  Products / Arduino Due / Re: Due compatible Time library? on: April 10, 2014, 07:29:17 am
Coming to an Arduino near you smiley

Actually I just looked at some of my library code and I haven't been following my own advice, might be time for a cleanup.

______
Rob
Pages: 1 2 [3] 4 5 ... 579