Remove M7 Diode from UNO(r2)

Projects General Guidance
1

hello there,

i'm using my arduino for an application where lots of LEDs that draw 1.5 A at max are in use.
my approach initially was to use a 12V power supply to power the arduino and to power the leds via the Vin port of the arduino.

after a month or so the M7 diode in front of the power regulator burned (and i found out that the diode used apparently does not take more than 1 A - which i exceeded at some point) - i learned something here.

my question is: is it safe to remove the diode and just bridge the hole? of course i would lose the protection for powering the arduino the wrong way but i could live with that. what other implications come with removing this diode?

thanks in advance for your advice!

2

The only other change will be that you will shift the input voltage range down by 0.7v (you will lose the 0.7V drop of the diode).

3

that makes sense, thank you.
but with a 12 V power supply i should be on the safe side.

4

You would, of course, also loose the polarity protection the diode provides.

5

motzi:
after a month or so the M7 diode in front of the power regulator burned (and i found out that the diode used apparently does not take more than 1 A - which i exceeded at some point) - i learned something here.

The MC33269 voltage regulator on the Uno R2 board is rated at 800 mA. So you will have something else burning out fairly soon.

I suggest a different approach.

I withdraw that comment, you aren't using 5V, right?

However I don't know if the tracks on the board are designed to take 1.5 amps. Maybe they are.

6

How are you controlling the diodes?
12V-resistor-LED-?transistor?-arduino pin?