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556  Using Arduino / Project Guidance / Re: Solution for proximity kill switch on: May 31, 2014, 08:24:26 am
I'm struggling to imagine the use cases where this makes sense. You're planning to walk away from your bike leaving the key in the ignition?

I think the OP meant that if the owner (or carrier of the tag) isn't close to the bike, the engine won't start.... so someone attempting a hot-wire would be unsuccessful.
557  Using Arduino / Project Guidance / Re: Switch on: May 31, 2014, 08:00:05 am
This seems very similar to the question in your other thread. You won't double the chances of an answer by doubling the number of times you ask the question; if anything it annoys people who might then decline to help, and it pisses the mods off.

Work through the examples, look at the link to the relay tutorial I gave in the other thread.
558  Using Arduino / Project Guidance / Re: Traffic Control on: May 31, 2014, 07:53:56 am
If you have literally just bought your Arduino, you need to work through some of the examples in the IDE (File > Examples > ...) or here.

This is a good tutorial for using a transistor to switch a relay to switch the real load.
559  Using Arduino / Project Guidance / Re: Need Help - Wireless Communication between PC and Arduino on: May 31, 2014, 07:35:38 am
Right, tested the Wixel range.... seems to work over 15-20m or so and more important through a number of brick walls. I had the remote Wixel's Tx and Rx pins jumpered for a loopback, and walked around with laptop. Characters typed in were loopedback until I got out of range out in the garden.
560  General Category / General Discussion / Re: What are the qualifications needed for a Project manager in an engineering firm? on: May 31, 2014, 06:18:59 am
Rob's right: you need to have shown your technical expertise first. And while it's true that a PM can't be a guru in all the technicalities of a project, he or she needs to have demonstrated a level of technical skill. Without that, the PM has no respect from the project members. Then from the PM's point of view, it's also important to have enough technical skill to not be taken advantage of.

So yep, knuckle down to getting some solid technical experience.  While you're doing that, look at the various PM qualifications that are around. You don't have to go the whole PMI PMP route- maybe look at CompTIA's Project+ as a starting point.
561  Using Arduino / Project Guidance / Re: Need Help - Wireless Communication between PC and Arduino on: May 31, 2014, 05:41:01 am
Yeah those Wixels are not a cheap solution- I was reluctant to spend the money too. Sorry I can't advise better on their range, especially through walls.

But that said, they are very easy to use, since all they are is a wireless usb. My Arduino sketch just reads a character from the serial input, and uses "if" to decide what to do. On the PC I use PuTTY to send characters.... so you could have "b" for blink and "s" to stop.

Tell you what though, I'll set them up this afternoon or tomorrow and do a quick test. I'll try various things like in the house (ie through walls) and out in the open. Always assuming I can find them.... (EDIT: Ok, I found them, so that's a start)
562  Using Arduino / Project Guidance / Re: Need Help - Wireless Communication between PC and Arduino on: May 31, 2014, 04:59:47 am
Yep you need two: one goes in the PC USB and the other is hooked up to the Arduino- I used breadboard. It's basically wireless USB.

You might like to have a look at this thread from last year when I was figuring it all out. On Pololu's site you can download the pdf Wixel manual.

EDIT: I have no idea about the range. When I was testing I was following the robot round the house, probably never more than 2-3 metres away.
563  Using Arduino / Project Guidance / Re: Need Help - Wireless Communication between PC and Arduino on: May 31, 2014, 04:38:11 am
I don't know the "best" solution, but I've used Wixel from Pololu before, and it's dead simple. It's wireless usb.
564  Using Arduino / Project Guidance / Re: Relay with physical switch on: May 31, 2014, 04:27:43 am
That's just the same as wiring a light on a stairs so you can switch it on at the bottom and off at the top, with the added spin of one switch being a (edit: spdt) relay.

http://www.electricaltechnology.org/2012/11/stair-case-wiring-circuit-diagram-or.html
565  Using Arduino / Programming Questions / Re: Help with logic on: May 31, 2014, 02:53:12 am
You might find useful.
566  Using Arduino / Project Guidance / Re: Dog Toy Dispenser on: May 31, 2014, 01:54:37 am
Every time I see this thread in the forum I think it says "Toy dog dispenser" and I'm imagining a chihuahua being shot out of a chute into a rottweiler's mouth.

(Which, by the way, is an idea I would fully support......)
567  Using Arduino / Programming Questions / Re: Is there a way to limit the time of a current output pin state? on: May 31, 2014, 01:50:24 am
What this shows is that it's best to capture the required process somehow, before going anywhere near the IDE and typing a load of code in.  Various approaches to diagramming exist for that very purpose: old-school traditional flowcharts, structure charts, state diagrams and so on.

Or, as you say, sleep on it.... problem with that is (for me anyway) is that if I wake up in the middle of the night with a light-bulb moment the light-bulb goes out immediately and in the morning the idea has seeped away.
568  General Category / General Discussion / Re: What are the qualifications needed for a Project manager in an engineering firm? on: May 31, 2014, 12:52:22 am
i have completed my electronic engineering degree ..... im not that good in technical side.

Interesting admission.
569  Using Arduino / Sensors / Re: LM35 not showing expected temperature. on: May 30, 2014, 12:44:51 pm
it is neither logical nor a good practice to write analogRead (5) instead of analogRead (A5)

That may be true, but it's not what you said earlier....

Quote
You have to write :
analogRead(A1) ;

.... which is not true.

570  Using Arduino / Sensors / Re: LM35 not showing expected temperature. on: May 30, 2014, 10:39:05 am
analogRead(A1) ;

My working code is:

Code:
// read the temp
        rawVal=analogRead(5);//Connect LM35 on Analog 5
        temp=(500 * rawVal) /1024;
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