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16  Using Arduino / Microcontrollers / PLC Analog Input Module With Arduino on: June 12, 2014, 08:36:13 pm
17  Using Arduino / General Electronics / Re: [SOLVED] I adapted a scematic, PROBLEM: I'm a noob on: June 12, 2014, 05:22:29 pm
I may be reading it wrong, but I see the external 5V supply connected to the 5V pin instead of the Vin pin - that's not good for the lifespan of the Arduino.
18  Using Arduino / Project Guidance / Re: i need help for my graduation project on: June 12, 2014, 04:17:52 pm
Doing degree completion for money could be disastrous because we would be unleashing completely unqualified engineers on the world and some of them will be designing things that could cause you harm.

With the internet and many documented  cases of plagiarism and cheating in school many students (the OP I am sure does not fall into this category) many engineering students have never been confronted with a problem that a million people have not already done, documented it put it on the web etc.  As I would tell my engineering students no one is going to pay you much money to answer questions that have already been asked.  The hardest problem assigned in your 4 years of class will be easier than a very simple project out in the field.

My attempt at humor failed - not uncommon for me.  LOL
19  Using Arduino / General Electronics / Re: Stepper wont turn. jitters in place on: June 12, 2014, 03:53:46 pm
Current is not "pushed" to a device - the device "draws" the current that it needs. A motor that needs 5V, 20A can be safely connected to a 5V, 100A supply - the power supply will not "push" 100A into the motor.

There is no limit to the current capability of a power supply that you connect to an Arduino, the VOLTAGE is what matters.

You will want to power all the devices from the power supply itself, not the Arduino.

20  Using Arduino / Project Guidance / Re: 315mhz or 433mhz FCC rules on: June 12, 2014, 03:31:26 pm
under "Any" it says 200 uV/m @3m, .  is that means 3 minutes of continuous transmission?

It clearly does.  Audio and video senders are an obvious examples of continuous transmission, whereas slightly higher power levels are permitted for low and very low duty cycle (that was the word I was looking for earlier) transmission.

It clearly does NOT mean 3 minutes. That is referring to field strength at 3 meters distance from the antenna.

I am not aware of any limits, as several devices that fall into the category of low-power, non-licensed transmitters such as cordless phones, baby monitors, etc are not time limited in any manner.
21  Using Arduino / Project Guidance / Re: Anyone ever try this? on: June 12, 2014, 02:54:26 pm
Scavenge parts from this?
22  Using Arduino / Project Guidance / Re: How hard would it be to build something similar to this? on: June 12, 2014, 01:35:42 pm
Have you considered using one of the DDS signal generators? AD9850, DDS-60, etc?
23  Using Arduino / Project Guidance / Re: i need help for my graduation project on: June 12, 2014, 01:14:59 pm
Perhaps we should start a "Graduation Project Completion" business and then donate the proceeds to Massimo...
24  Using Arduino / Project Guidance / Re: How hard would it be to build something similar to this? on: June 12, 2014, 11:36:43 am
If you want to be taken seriously then don't post inappropriate comments. Do you think that impresses people? Does it make you feel like a big man? It makes you look petty and foolish.

I reported your post, hopefully it's removed and you get a temporary ban, as my son uses this site and it's 100% WRONG for him to have to come across the vulgar rantings of petty, foolish people.

Vulgarity simply points out the ignorance of the person using it, and very, very few people are willing to help those that attack them with vulgarity.

Pretty Funny,

I ask for help with a project,

NOBODY responds....

I post something that might help one out, but it contains a controversial comment....

a lot of people jump on it.

Talk is cheap!
25  Using Arduino / General Electronics / Re: Which Handheld Oscilloscope? on: June 02, 2014, 12:54:46 pm
For a USB oscilloscope nothing beats this for anywhere near the price

I have this with the signal generator and logic analyzer plugins. This gives me a true two channel ~30MHz oscilloscope, 8 channel 100MHz logic analyzer, and 20MHz signal generator for equal to or less than the price of the DSO Quad.

26  Using Arduino / Project Guidance / Re: Which Ardunio and what other parts will I need on: June 02, 2014, 11:09:26 am
The Arduino Uno has a total of 20 inputs (14 digital inputs/outputs and 6 analog inputs), so that would easily handle your estimated 8 buttons.
27  Using Arduino / Project Guidance / Re: Sensors & controllers project advice on: June 02, 2014, 10:01:31 am
I would use a separate power supply for the sensors myself to insure that all the sensors receive adequate power and that the Arduino is not overtaxed.
28  Using Arduino / Project Guidance / Re: Sensors & controllers project advice on: June 02, 2014, 04:10:58 am
For pH you have, but that does NOT include the actual probe, it is just the interface for a probe.

Do you already have the pH probe to interface with it? If not they have a one here
29  Using Arduino / Project Guidance / Re: Lacking Knowledge on: June 01, 2014, 11:48:25 pm
I think a reed switch would work very well for this project. You could use one reed switch to stop the motor when the window reaches the top, and another reed switch to stop the motor when it reaches the bottom. You can place the reed switches anywhere you want along the window frame to indicate the extremes of open and closed - this would allow for the small clearance that you mentioned for protecting delicate, inquisitive fingers.

Reed switches are literally just like any other switch as far as the Arduino is concerned. In the following example, the reed switch attached to digital pin 2 could represent the open position of the window, the reed switch attached to digital pin 3 could represent the closed position of the window. You would probably want to activate the internal pull-up resistor for the two digital pins, or attach a 10k resistor between the reed switch on each digital pin and the 5V supply on the Arduino. This resistor "weakly" pulls the switch up to +5V, so that if the switch is open, it will have 5V on it (through the resistor) and thus will register HIGH if not pressed, and LOW if pressed.
30  Products / Arduino Due / Re: Flash page is locked on: June 01, 2014, 05:42:36 pm
The resolution to almost every uploading issue with the Due is to ERASE the Due by pressing the ERASE button, then pressing the RESET button. This will get you back to the native bootloader
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