Is that one of those cameras that makes the obnoxiously loud CLACK you hear during press conferences?

not many (if any!) journos would use a Hasselblad, or any other medium format camera.

Exactly. I use mine for architectural and portraiture mainly. It would be far too bulky/heavy to lug around for news photography. Most journos that I know who still shoot film use a motor-drive 35mm.

Is that one of those cameras that makes the obnoxiously loud CLACK you hear during press conferences?

No.

My Hasselblad 500C/M that I've had since the early 70s is now discontinued tech. Not a bad run.

I think I'll start a petition on petitions.whitehouse.gov to allow microcontroller boards on airliners as long as they are 2.36 inches or shorter.

Don't forget that I/O boards have to be limited to 10 pins.

Why? Where is that limit from?

In your state, a "large capacity feeding device". Unless you have the proper "license to carry". 

Yeah, definitely go fro the freebie!

But let's face it, PapaG, Snapple doesn't quite have Fluke's cachet...

You're right! Snapple could be the winner on a hot summer day in Dallas, though.

Maybe I'll just duct tape a small torch to one of my other caps?

Now that's the true DIY way!

.... of these.

Hey it's a Fluke so that means it probably cost $75 dollars, but worth it. 

Lefty

You'd think! It actually costs only half that. It did get a bad review on Amazon, but then there's always someone.

I have emailed the local supplier where my kids got my Fluke DMM at Christmas, to see if they have or can get me one. But yeah, at Fluke prices and import duty and exchange rates it'll cost a fortune.

Yeah, definitely go fro the freebie!

I got this at Homegrown Fest last year as a give-away from Snapple. The LEDs are built into the brim and it even has replaceable batteries. Admittedly not a Fluke, but pretty techy none the less.

In some industries, to meet certain safety standards, the interface to such sensors must be an intrinsically safe barrier. They are usually quite expensive. If that is the case in your application, it usually isn't practical for an individual to make their own barrier as it would have to be certified.

I had these made to see where I could just design circuit boards as jewelry:

I like that. It looks like it might make a good fishing lure, as well.

The example you linked to is using SPI to communicate with the LCD. Do you plan to communicate with the Arduino over the UART or do you want it to be an SPI slave as well? Either way, there won't be any conflict between the two.

There is a peripheral for the Raspberry Pi called the Gertboard that might be worth your attention. It has an ATMega328 slave as well as a motor driver and a small prototyping area. Since the Arduino IDE runs on the Raspberry Pi, you could possibly do all your development on the one hardware platform.

Join this forum:

http://www.raspberrypi.org/phpBB3/viewforum.php?f=16

You'll find it a lot friendlier for projects that involve both the Raspberry Pi and the Arduino. Come back here when you have questions that pertain more to the Arduino side of your project.

Thanks Retro and Papa.  Just to let you know Papa, I knew how transistors worked, but the symbols stumped me for some reason.  Last night (late), it finally sunk in.  So, +1 to ya both.

Thanks, codlink, I knew you'd get it if you thought about it long enough.

To make this easy, I attached just one of my relay circuits.  This schematic, from what I can see, is the same as in the link that Papa posted, except for adding a LED (w/resistor) between GND and +5V.

No, more like this.

so, my question in reply 26, will it work?

Is you intent still to energize the relay with a LOW on INx?

If so, you will use a circuit like http://www.ebay.com/itm/8-Channel-DC-5V-Relay-Module-for-Arduino-PIC-ARM-DSP-AVR-MSP430-TTL-Logic-/271188081780?pt=LH_DefaultDomain_0&hash=item3f2411bc74&autorefresh=true.

so, my question in reply 26, will it work?

Is you intent still to energize the relay with a LOW on INx?

I see how you got confused. Notice they are biasing the phototransistor to switch faster rather than act more linearly. I don't know what the purpose of the Olimex circuit is. It's an optically coupled OR-gate that resets the processor for whatever reason I don't know.

Not quite. It's poorly drawn. Note that each opto collector has a I1, I2, I3, or I4 label. These wire over to digital input pins on the processor chip.

lol, no I mean the schematic posted with reply #26.