Arduino mega 2560 shown in Windows 7 as UNO

Development Tools IDE 1.x
1

Hi,

Few days ago i received my arduino mega 2560 (guess a clone) from . eBay
downloaded the arduino software from the website (arduino-0022)
And did a manual installation in windows device manager. it all works..but my windows shows my mega 2560 as an arduino UNO. i also installed the arduino mega on my laptop, and there i got the same problem.
by Tools->Board, it was on UNO by default, so i change it manual to mega 2560.
I played with the arduino (blinking led, fading led, servo/potentiometer, lcd screen) it all works. but is this a problem or not?

2

If it works OK, then don't worry about it.
BTW contrary to what the documentation says, you need to use a resistor on the LED (atleast 100 ohms).

3

No resistor is required on pin 13? i use a 220 ohm resistor when i put the LED in another pin, pin 10 for example.
when i upload a sketch, (blinkinled) the program tells me. Binary sketch size: 1588 bytes (of a 258048 byte maximum)
And in kilobytes it is 252. so i have the space of an mega 2560..

4

I think a resistor is required by all pins. BTW pin13 should already have an LED on it.

5

Both the Uno and the mega2560 use the same on-board 8u2 USB serial controller device that uses the same USB PC software driver. The driver cannot tell or cares if it's being used on a Uno or mega2560 board. Only the Arduino IDE needs to know what kind of board you have attached and is why you have to select the proper board type before uploading.

All digital output pins need series resistors if wired to external leds. The on-board pin 13 has a on-board current limiting resistor for that led, but that resistor does not protect anything externally wired to pin 13.

Lefty

6

holahoep

I'm sorry you bought a clone on ebay. now you're on your own...

If you had bought an original board you would have gotten a replacement immediately.

I suggest you contact the seller and ask for a replacement

m