hello everyone,im new to this arduino life. Im in a group of three and we had pick engineering as our school semester's project.Our project is an home automation system and we are trying to also make the board to detect short circuits. Our biggest problem now is we dont know how to make the board to detect short circuits.As a beginning, we would like to use 5V.these are the links we used for the home automation system..... http://androidcontrol.blogspot.com/20... http://www.smart-homecontrol.com/ http://softpowergroup.net/ like to use 5V.
THANK YOU FOR YOUR COOPERATION AND IF IT'S NOT A BURDEN PLSSSSSSSSSSSSSSS REPLY ASAP....AND YOU COULD ALSO REPLY TO MY EMAIL afrinahutcherson@gmail.com
itsafrina, I have read the other topic and your question. And I opened the links. I'm sorry, but I don't understand it. The first link has a page that is mostly empty.
What kind of short circuit do you want to detect ? A short circuit in what ?
If the mains has a short circuit the (automatic) fuse will blow. That will stop the current, so the short circuit can no longer be detected.
this is the actual link of our home automation system.You could also watch in youtube by typing ARDUINO HOME AUTOMATION SYSTEM(pick the first video) http://androidcontrol.blogspot.com/20...
We are using 4 LEDs that are connected to the relay board(as shown in the video of the link above).At first, we are planning to make all the 4 LEDs to lit up and later one LED would be turned off due to the short circuit., The problem is we dont know how to make the LED turn off due to the short circuit.
we started a new one cause the thread we used was off the topic..THANK YOU FOR RESPONDING ASAP CAUSE OUR PROJECT IS DUE IN 2 DAYS.
How do I know that the first video that I see is the same as the first video for you ?
This link shows a page that is empty : http://androidcontrol.blogspot.com/20...
I tried Google Translate on that (empty) page, but Google Translate can't translate it.
if it's not a burden, could you watch it on youtube.just type arduino home automation.Im very sure the first video you click will be the same with what are we doing.BTW, THANK YOU SO MUCH 4 REPLYING ASAP AND RESPONDING TO US.
im sorry but these were the links given at the end of the video.i had asked my teacher about the short circuit and he said try manipulating the LED through coding but he is not sure how to do it. Is it possible to do it?how?
I have attached a screendump of http://androidcontrol.blogspot.com/**20...**
There is nothing there to see. That is because it is not a complete link, but only half of the link. The "20..." is wrong.
Could you ask someone else to describe in English what your project is about. You keep talking about short circuit, but we still don't know what you mean by that.
we are so sorry sir, our project is like this.We are using 4 LEDs that is connected to the relay board.Other components are arduino mega board,ethernet shield,light and motion sensor and jumper wires.So as we said earlier, after making connections with all the hardware components,(i've sent you an attachment of the diagram)we would upload the coding.After uploading,we could easily control the LEDs using our smartphone. that was for our home automation system(already made the prototype and it worked) but for the short circuit,we have a problem.When all 4 LEDs are lit on,we would like to make one of the LED to blow out due to short circuit but we dont know how to do that.Our question is:
1.is it possible to do that?
2.how to do it?
You need to use two relays for one led.
One relay with a normal resistor for the led, and another relay with a smaller resistor to apply too much current to the led.
To blow a led is very odd, since the resistor should not blow, and the current to blow a led can be anything. Some leds can have 10 times the nominal value for a short time, they also can catch on fire. Did you try to blow many types of led and check which current is needed and what happens ?
I strongly suggest not to blow/burn/blast a led, since it is dangerous and no one knows what will happen.
Pin 4 is used for the relay in the picture, but pin 4 is also used by the Ethernet Shield. I would use pin 23, 25, 27 and so on for the relays.
