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1  Using Arduino / General Electronics / Re: Whats are the holes on this relay for? on: Today at 05:28:54 pm
I think he means he is hooked up to either NO and C or NC and C, and wondering what the other connection (either C or NC) is used for. I don't think he means he spanned over the C and connected the NO and NC together
2  Using Arduino / Project Guidance / Re: Arduino and PLC Intragration on: August 16, 2014, 07:05:55 pm
A Google search for Arduino ph gave me 1.41 million hits.

This is one of the cheaper implementations: http://www.dfrobot.com/index.php?route=product/product&product_id=1025
3  Products / Arduino Due / Re: error compiling on: July 29, 2014, 01:50:41 am
Without seeing the sketch that you are trying to compile it's rather difficult to offer any advice.
4  Using Arduino / Programming Questions / Re: Libraries vs "sketchbook folder" libraries on: June 22, 2014, 03:09:06 pm
If there is still a library out there that is broken by the changes to IDE 1, then that is abject laziness on the part of the developer. Developing requires CONSTANT changes and updates. The people that make the environment that someone to chooses to develop for have ZERO OBLIGATION to hold people's hands for something that they are giving away for FREE.

If it's such a terrible problem I have a solution - STOP using Arduino, STOP helping in the forums, STOP writing libraries, STOP the juvenile whining.

Arduino owes you NOTHING. Their JOB is to develop the hardware. The IDE was simply a GIFT to the community. Nothing is stopping you from tossing the IDE entirely, writing your own libraries and code in assembly, and uploading from the command line through a toolchain that you configured entirely on your own. See, no more "Bad, evil, mean Massimo" tarnishing your coding with his "Terrible, disgusting, up to date, FREE IDE."

I SERIOUSLY doubt that you, or anyone else here have suffered any harm by the changes to IDE  1.  For some unknown reason, people just persist in wanting to make the world think that they are some sort of victim. Get over it or leave - the incessant negativity causes far more harm than ANYTHING that IDE 1 has caused.
5  Using Arduino / Programming Questions / Re: Libraries vs "sketchbook folder" libraries on: June 21, 2014, 10:33:24 pm
Ultimately the Arduino group has the right to make any changes that they see fit for their product. Does that potentially place 3rd party developers at odds with them? Of course it does. However, considering that the Arduino IDE is the work of the Arduino group, they have every right to force changes in order to move forward with their development goals. Any third party developers that do not like this reality certainly had the opportunity to simply stop supporting Arduino - nothing was forcing them to do so. Complaining to this day about this subject is simply sour grapes.

6  Using Arduino / General Electronics / Re: What RTC real time clock module is the best? on: June 14, 2014, 01:53:05 pm

For a few pennies more you could have a ready-made DS3231 with 32kb of EEPROM, accurate to 2ppm rather than the 20ppm of the crystal that you listed. I need ACCURATE TIME not SLOPPY time, so I demand the DS3231 - others may not have such requirements.

If size is the paramount consideration, build your own DS3231 without the EEPROM. It even has a lower component count than the DS1307.
7  Using Arduino / General Electronics / Re: header block tails are TOO SHORT. WHERE can I get the good ones? on: June 14, 2014, 01:39:10 pm
The last time this conversation came up, somebody pointed out that the square type B connector used on the Uno/Mega is still used by USB printers

As you would expect.  The argument that the smaller connector would be "more durable" is certainly counter-intuitive.

And then there is the "mini", used on disk drives, hubs and all sorts of widgets.

though they seem to be the last holdout, and most things have gone to the micro-B plug ... Part of this is the European law that mandated micro-B as a standard for cell phone chargers.

Where "most things" means phones and tablets.  Which makes perfect sense.  The flimsy connector on an Aldi mobile phone which looks like a micro B but isn't, and breaks easily was rather annoying.

I've seen complaints that the micro B connectors tended to rip off of electronics more than the mini B, but with the exception of stuff from Adafruit, all of my USB gadgets have been micro B for the last few years.

But therein is the trick - in your hands or most of ours, this may well not be a major problem.

The 5.5x2.1mm co-axial terminals seem to be heavily used for security cameras.

And modems, and network switches, and many other things.  But there are many variants, especially on laptops, some ridiculously small such as on my ASUS EeePC here!


The retention strength and make/break rating of micro USB is far superior to any other USB - look at the specs instead of personal opinion - just like a component the datasheet/specs are the go to for information, not personal opinion. Micro USB has a passive latching mechanism which increases retention force but which allows removal without active user action. Micro USB is rated in excess of 10,000 insertion cycles vs 5,000 for mini and 1,500 for standard.

As for the micro USB connectors ripping off, that is nothing but shoddy, amateurish soldering, not a design flaw. Micro USB is designed to reduce the mechanical wear on the device; instead the easier-to-replace cable is designed to bear the mechanical wear of connection and disconnection. The Universal Serial Bus Micro-USB Cables and Connectors Specification details the mechanical characteristics of Micro-A plugs, Micro-AB receptacles (which accept both Micro-A and Micro-B plugs), and Micro-B plugs and receptacles, along with a Standard-A receptacle to Micro-A plug adapter.

Everyone is entitled to their opinion, but that does not change the fact that micro USB is far superior to any other USB connector to date. All other USB connectors have been deprecated and the only one recommended for use today is the micro. Any company using other than micro USB is not following best engineering practices.
8  Using Arduino / General Electronics / Re: header block tails are TOO SHORT. WHERE can I get the good ones? on: June 14, 2014, 01:32:05 am
Quote
Mini and micro USB are both better, more durable, and more reliable than B.
But the leads / sockets tend to have a high resistance. On the Raspberry Pi this can cause a drop of over half a volt with some leads.

Since this affects Raspberry Pi, I say the issue is with the construction of the Raspberry Pi rather than the USB mini or micro - It's certainly not an issues with the millions of phones and tablets that use mini and micro USB. Nor is it a problem with the Arduino Due or Tre or Leonardo or Micro or Nano or Fio or Zero or...
9  Using Arduino / General Electronics / Re: What RTC real time clock module is the best? on: June 13, 2014, 10:41:00 pm
The chronodot is an overpriced DS3231. http://www.maximintegrated.com/en/products/digital/real-time-clocks/DS3231.html

DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal.  The DS3231 is accurate to 2ppm at 0-40 °C range

No need to pay the inflated price of the chronodot though. I get my pre-made DS3231's from here, with an onboard AT24C32 32K EEPROM:

http://www.banggood.com/DS3231-AT24C32-IIC-High-Precision-Real-Time-Clock-Module-For-Arduino-p-81066.html
10  Using Arduino / Sensors / Re: Colour Sensors on: June 13, 2014, 10:29:09 pm
Without more information about the sensor all we can do is make up pretend answers. Can you at least link to the specifications for the sensor? For instance, we have no idea if you are using the EV3 sensor or the NXT sensor.
11  Using Arduino / General Electronics / Re: header block tails are TOO SHORT. WHERE can I get the good ones? on: June 13, 2014, 10:17:57 pm
I never understood the logic of using 0603 and 0402 SMD components to construct the boards and then slapping the dinosaur equivalent of USB and power jacks on them.

Well, it makes perfect sense.  SMD components are cheaper and easier (using automation) to assemble, so they are what you use.  Unless you can cite a smaller variant of the USB "B" socket, it remains that these leads are the most readily available, particularly for the "hobbyist".

As for the power connector, the 2.1 mm pin "barrel" is really the only particularly common fitting.  There are many other (smaller) sizes; too many in fact for any to form a "standard"  The micro-USB used on the Pi is something of a pain but certainly is a reliably available standard for regulated 5V and therefore not relevant for "Vin".

Virtually the entirety of the electronics industry other than Arduino abandoned the USB B long ago. Mini and micro USB are both better, more durable, and more reliable than B. That's why the industry abandoned the B.  The negatives of the USB B far outweigh any potential positives. At least with Due and the Tre Arduino is moving in the right direction as far as USB is concerned.

Actually the 5.5 x 2.5 is far more common than the 2.1. There is nothing forcing Arduino to even use a coaxial barrel connector.

I use type E 1.3 x 3.5 power connectors for all my devices - they are readily available from virtually any supplier of electronic components, they are rated 24VDC@5A, and they are less intrusive.

At least the future of Arduino has come into the 21st century as far as USB ports, now we just need them to graduate to a better power connector.
12  Using Arduino / LEDs and Multiplexing / Re: Colorduino Problem on: June 13, 2014, 04:25:00 pm
Have you downloaded the Colorduino I2C demo? https://code.google.com/p/colorduino-i2c/downloads/detail?name=colorduino%20i2c%20demo%20.zip&can=2&q=

Line 22 shows you how to set the I2C address: #define I2C_DEVICE_ADDRESS 0x05  //I2C address for this device
13  Using Arduino / General Electronics / Re: header block tails are TOO SHORT. WHERE can I get the good ones? on: June 13, 2014, 04:01:22 pm
Both the USB jack and the power jack are universally available in much smaller sizes that provide the same or better reliability and capability.

No excuse for any board to still be using the gargantuan stone age connectors. They are neither stronger, more reliable, nor provide more capability than the smaller options.

I never understood the logic of using 0603 and 0402 SMD components to construct the boards and then slapping the dinosaur equivalent of USB and power jacks on them.
14  Using Arduino / Project Guidance / Re: Anyone ever try this? on: June 13, 2014, 01:01:41 am
I completely concur.
15  Using Arduino / General Electronics / Re: [SOLVED] I adapted a scematic, PROBLEM: I'm a noob on: June 12, 2014, 11:13:49 pm
My concern is the vast number of power supplies that claim to be "regulated" but in fact put out far in excess of their "regulated" voltage.

Obviously only the OP knows the quality of his power supply.
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