Hi,
I am just starting a new project, never used to an arduino before. how I can I protect my board from over voltage and over current. so that i dont fry my board.
thank you
husnalraikumar:
Hi,
I am just starting a new project, never used to an arduino before. how I can I protect my board from over voltage and over current. so that i dont fry my board.
thank you
The nature of the arduino design is to allow users to wire up stuff and make things happen. Because of that there is no easy way to prevent damage from not knowing the proper voltage and current limits one must obey or risk damage. Education will go a long way and careful planning of new circuitry you wish to use.
But that aside there is one company that went out of their way to try and design a robust and user error proof design as possible. One would have to work pretty hard to destroy one, but of course it's not a 100% guaranteed idiot proof.
http://ruggedcircuits.com/html/ruggeduino.html
Good luck;
Lefty
I bought an Arduino Mega 2560, so cant go with this one. is there any other way to protect it from over loading voltage ??
Don't apply more than 5V to the I/O pins, Keep to the voltage limits on the power input. Use current limiting resisters with thing like LEDs, use the correct diodes with coils.
Mark
voltage regulator?
and current limiting resistors?
husnalraikumar:
is there any other way to protect it from over loading voltage ??
The obvious answer is don't do anything which would cause excessive voltage or current.
You're dealing with electronics. They aren't idiot proof. You need to understand what you're doing before you try connecting it to external hardware, otherwise the Arduino or external hardware could be damaged.
If you aren't confident of your ability to keep the hardware safe, then perhaps the Mega 2560 isn't a good starting point. It has a SMD microcontroller which means it's practically impossible to repair of you damage it. In comparison, a UNO R3 has a chip that just pushes into a socket so can be replaced within minutes at the cost of a couple of bucks if you break it.
In comparison, a UNO R3 has a chip that just pushes into a socket so can be replaced within minutes at the cost of a couple of bucks if you break it.
Sadly many of the UNO's now come with the SMD and the DIL/DIP ATMega386 chip.
Mark
holmes4:
In comparison, a UNO R3 has a chip that just pushes into a socket so can be replaced within minutes at the cost of a couple of bucks if you break it.
Sadly many of the UNO's now come with the SMD and the DIL/DIP ATMega386 chip.
Mark
Well in the case of the Uno boards, the user has the choice to buy the DIP or SMD versions, but in all cases the USB serial converter will always be a SMD component. But that was the case with the pre UNO based boards that used the FTDI based USB serial converter chip. The DIP based version is the much better choice as I see no advantage to buying a Uno smd version over the Uno DIP version, just disadvantages.
Lefty
The single easiest way to protect the cpu chip is to use small value series-resistors
in the I/O lines, eg 150-330 ohms. This will prevent over-current due to short-circuits
on the pins, and also over-voltages like 12V from blowing the chip. For over-voltage,
the series-Rs work in conjunction with the internal clamping diodes on the I/O pins.
OTOH, nothing will prevent damage if you apply too much voltage to the 5V or 3.3V
pins on the Power header - as a lot of people seem to do. The only hope there is
to be careful when plugging things in.
For starting out, it's 10X better to use a UNO board, so you can change out the
atmega328 chip if you do blow it. With the boards with surface-mount chips, all
you're left with is $65 toast, if you blow the cpus.
At the risk of diverting this thread, would others here like to keep the Uno as a card which only use's the DIL/DIP chips and not the SMD's ?. Or at least have the SMD divice mounted on a breakout board?.
What about the mega and the Due? Can not these chips be mounted on DIL/DIP breakouts and then on to (redesigned?) card?.
After all replacing a chip is alot cheaper than replacing the whole card, and we all "let the smoke out" from time to time.
Buying something bigger than you really need is a typical biginners error, so don't say the mega/due is not for the noob's.
Mark