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1  Using Arduino / Microcontrollers / Re: Arduino Tre Price on: April 01, 2014, 01:41:14 pm
$23 to ship with Global Shipping: http://www.ebay.com/itm/181366863940
Well, a Fluke meter in a hard case is a far cry from a Arduino Tre.  $23 is not half bad for that.  But I get your point.  Still there is a good choice in that group you present.  That's what I mean.  So It costs $23 to have a Fluke meter in a hard case sent to Spain.  Not $60 or more, as choosing those would be foolish (like those that choose to pay SprkFun $2 for an LED).

I'm in Spain. I've ordered over 500 things on eBay, I think only two of them never turned up.

That's why I mentioned Spain.  Honestly, I don't know what to tell you Fungus.  Not sure if the items went 'missing' in the system, or if the recipients were not being all that honest.  Either way, with the tiny mark-up on these things, there was no way I could sustain giving back the money on 25% of my shipments.  It's too bad, because the other 75% really seemed appreciative.
2  Using Arduino / Microcontrollers / Re: Arduino Tre Price on: April 01, 2014, 01:31:08 pm
Or maybe you over-estimated the volume available -- Sparkfun doesn't make money by selling individual RGB LEDs.

The LEDs were only an example.  BTW, SparkFun sold many, many, many, many times what I sold at 6 times the price.  So it must have been marketing.  Flashy ads are worth paying more of your hard earned money for sure.

Or maybe the people who care about price go to Digi-key, where they can buy them for $0.649 (or $.66, for the double-bright ones.)

Well at 3 of the super-bright for $1.00, I was still half the price of Digi-key

Anyway: If the Tre can sell for $49, it may have a chance.

I agree on this.  It has to enter the market competitively.
3  Using Arduino / General Electronics / Re: 12 v flow sensor and arduino on: April 01, 2014, 11:19:44 am
If it has the NPN option, connect it up like in the attached drawing.
4  Using Arduino / General Electronics / Re: 12 v flow sensor and arduino on: March 31, 2014, 08:00:28 am
Well, it is important.  You might want to verify this one way or the other.  If it has the NPN option, you solution is very, very easy.
5  Using Arduino / General Electronics / Re: How to control by arduino " using transistor " on: March 30, 2014, 09:42:45 am
You mean you want to do something like this?

www.hdwallpapersphoto.com/2275/water-drop-wallpapers.html#prettyPhoto

The last time I did something like this I use a eye dropper to make the drops and a LED and photo transistor to detect the drop release.  This triggered a variable timer which triggered my flash.  The camera was manually operate in bulb mode.  The set-up was pretty simple and did not need an Arduino, but I suppose you could use one.
6  Using Arduino / Microcontrollers / Re: Arduino Tre Price on: March 30, 2014, 09:24:12 am
Well, chuckle away as you will.  Maybe you could ship them for that amount from the US, but apparently no-one else can, certainly not the "big guys".  One reason Amazon does not ship so much stuff from the US.

I'm not saying you are fibbing, just making light of your vendor choices.  BTW, I'm from Canada.

Sad.

Yeah, a bit.  Two really good people lost their jobs.  But you don't have to worry about me.  I still have my custom controls company.

I had to make do with this.

Good for you, that's a nice price.  But not everyone can use 50 of them, and I'll bet that vendor will not sell you your Arduino, some of those LEDS, a solder less breadboard, a couple of servos, some MOSFETS, a handful of different ICs and all the other stuff you need for your project, package it up in one box and send it to you for $12 like the last order we sent to Australia.
7  Using Arduino / Microcontrollers / Re: What do most compaines use for their commerical microcontrollers? on: March 30, 2014, 09:11:53 am
By far the majority of Atmel and Microchip MCUs go into commercial products.  The hobby market (we) is miniscule.

I don't think many, if any of us ever thought otherwise.


Maybe, but the OP's question indicated he might.
8  Using Arduino / Microcontrollers / Re: What do most compaines use for their commerical microcontrollers? on: March 29, 2014, 10:30:56 am
By far the majority of Atmel and Microchip MCUs go into commercial products.  The hobby market (we) is miniscule.
9  Using Arduino / Microcontrollers / Re: PC2102 Driver on: March 29, 2014, 10:22:08 am
IIRC, DTR will go low as soon as the port is opened.  RTS is done under program control.

Yes, either work fine for normal programming.
10  Using Arduino / Microcontrollers / Re: Arduino Leonardo on: March 29, 2014, 10:16:02 am
This may not be of any help, but...

I have found the best way to work with the Leonardo is the first smack it with a large hammer, throw it in the trash, then buy an UNO and proceed from there.
11  Using Arduino / Microcontrollers / Re: Arduino Tre Price on: March 29, 2014, 10:10:20 am
You guys make me laugh.  When I had my web store for micro-controller stuff I could ship most items to Australia for around $8-$10.  Not sure where you are getting $60 from.  Spain, was even cheaper, but unfortunately about 25% of the articles I sent to Spain never got to their customers.  So I stopped shipping to Spain.  But I never, ever had a problem with Australia the UK or the rest of Europe.  Even the Russian Federation was okay.  Just Spain.

Anyway, you all stayed away in droves, preferring to shop at far more expensive places, so I had to shut down.  Now you can no longer get 3 RGB LEDs for $1.00, but you can buy them from SparkFun or Adafruit for $1.95 each.  Good for you!!
12  Using Arduino / General Electronics / Re: Speaker with resistor to create proper load? on: March 29, 2014, 09:54:16 am
Or if it's a square wave output, build a little buffer amplifier using a transistor.  A 2N2222 would do a fine job.
13  Using Arduino / General Electronics / Re: How to control by arduino " using transistor " on: March 29, 2014, 09:44:25 am
Can you give us a link to the equipment you want to control?

I am a photographer too, and most of my high speed work is done triggering flash units.  However, you will not be able to do this by controlling the power coming form the mains into the flash unit.  The flash usually has a trigger input, which may or may not be of a fairly high voltage.

We really need to get some specification for the device you are trying to control, and some idea of what it is you will be photographing.
14  Using Arduino / General Electronics / Re: relay circuit won't work? Please help on: March 29, 2014, 09:34:40 am
DipTrace have a free version and it will allow you to design printed circuit boards as well. smiley-grin

http://www.diptrace.com/

15  Using Arduino / General Electronics / Re: 12 v flow sensor and arduino on: March 29, 2014, 09:29:55 am
Does the one you own have the NPN output?
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