seanz2003:
outcoming electronic component with 20 legs, which is called "ATMEGA328P-PU DIP-20 Microcontroller"
the 328p-pu has 28 legs. count em...
The 7805 of the Arduino...
a 7805 is not a standard part for the Uno, your wiring is not very clear in your description. Are you referring to the arduino's on-board regulator or an external component? If the onboard regulator, then it is irrelevant because you are powering the uno from USB. The v. reg. and USB are two seperate power sources.
The middle leg (pin #2) of a 78xx is ground (0v), the left leg (pin#1) is input ( you never mentioned what the voltage is of your external power source you are using), and the right leg (pin #3) is output (5v). If this statement-
... gives me the same Voltage, on the middle leg I get 4.3V and on the left leg I get 3.8V.
- is true, then something is either wrong with how you measured it or the 7805 is damaged or incorrectly wired.
Wiring and description aside, you might try a loop back test (http://arduino.cc/forum/index.php/topic,73748.0.html) to see if the usb-to-serial chip is damaged.
Hey,
I tried doing it but unfortunately my computer doesn't recognize the Arduino...
What should I do?
fungus:
KobiSexy:
The 5V output gives me 4.3V which is OK.Says who?
It should be 5V ... 4.3V is a huge error and indicates the power circuitry is probably blown.
Ok, so what should I do to fix it?
oric_dan(333):
Just a shot in the dark, but I had a problem even getting my Mega R3 board to work with
the Arduino IDE in the first place. I couldn't find any info anywheres at all about this, except
on the following thread, which gave a procedure that allowed me to install the proper driver
for the R3 USB chip. Non-intuitive. Maybe you have the same problem.
Sorry but what you describe here is not my problem.
Thank you.