ARDUINO UNO TO NANO

Projects General Guidance
1

HI All,

are the uno and nano boards pin compatibles?

i made sketch on an UNO board wich work fine and i tried to move it to a NANO.

The Nano died...
Before trying an other (i know it is cheap, but..), can any one confirm they are pin compatibles.

my sketch drive a Servo and a 4 relay board. the comand relay board is connected to 5v from the arduino 5V source out, relays's power is external and not coonected.

the servo supply is connected to an external power suply (grounded all together).
any idea? tks
jym

2

Pin compatible as in "you can stick both in the same socket" then definiltely no, and that's because the Uno has female headers and the Nano has male headers.

Pin compatible as in "they have the same number and designations at their pins" then yes.

4

Before trying an other (i know it is cheap, but..), can any one confirm they are pin compatibles.

They are pin compatible on most pins but not all. Example where they are different are: 3V3, 5V, RESET, D13.

The power supply of the Nano is much weaker than the UNOs so I'd guess it's a problem of the different voltage regulators.

5

HI Pylon,

tks for answer and tks to all.
What i mean is "pin compatible for numbers" of course.

Pylon told not for the D13 , what that mean?
I use this pin D13 and D12 to test a contact and it is going to ground. is it the problem?

i think there a problem on the supply, near CC at this time over 9v on the main supply (12v normaly).

many thanks for help.

jym

6

Pylon told not for the D13 , what that mean?

While the Nano has an LED directly over a resistor on D13, the UNO has an opamp in between.

I use this pin D13 and D12 to test a contact and it is going to ground. is it the problem?

Depends on the schematics but from your short description I would say it's a problem for the Nano but not for the UNO. Post your wiring diagram!

i think there a problem on the supply, near CC at this time over 9v on the main supply (12v normaly).

I don't find the context for this sentence. Please explain in more detail.

7

I do believe there is also some trouble using pins 4 and 5 for some things on the nano. nut in my experience which is limited. I have used a lot of sketch for both with simple pin changes

8

When I see "servo, 4-relay board, and 12volt supply", alarm bells go off.

The Nano can't power anything else on a 12volt supply (on V-in/raw).

The Uno will struggle powering one relay on a 12volt supply, and one servo is a big NO.

Need to see a wiring diagram.
Leo..