Digital I/O Pins Output

Using Arduino Microcontrollers
1

Dear all,
i got this situation:

Atmega328p circuit is built and tested.. and it works fine.
BUT, i noted that all digital pins output only 3.7V instead of 5V,
while analog pins output 5V as normal !
i tried to remove extra parts to test and figure out the problem, but still the same
now i only got the Atmega, Oscillator and a pullup resistor to the reset pin, and i got no advantage ..
tried to redo the code, i even tried a very simple code:

void setup()
{
pinMode(5, OUTPUT);
}
void loop() {
digitalWrite(5,HIGH); delay(5000); digitalWrite(5,LOW); delay(4000);
}

still got 3.7V on Digital pins
what could be the problem ?!

2

Pins here go between ~0v and ~4.9v

You may have damaged you pins in the past.

Show us a good schematic of your circuit.
Show us a good image of your wiring.
Give links to components.
Posting images:
https://forum.arduino.cc/index.php?topic=519037.0

3

Cant see the image here.

4

srnet:
Cant see the image here.

You aren't missing too much...

34a0579b19d42b2c357dc8fa397bb7bd-full.png
34a0579b19d42b2c357dc8fa397bb7bd-full.png1024×540 90.2 KB

34a0579b19d42b2c357dc8fa397bb7bd-full.png
34a0579b19d42b2c357dc8fa397bb7bd-full.png1024×540 90.2 KB

5

BJHenry:
You aren't missing too much...

34a0579b19d42b2c357dc8fa397bb7bd-full.png
34a0579b19d42b2c357dc8fa397bb7bd-full.png1024×540 90.2 KB

So, i guess this shall work just fine

6

adolfhack:
So, i guess this shall work just fine

Does it work just fine? That picture is too blurry to be of any use.

7

I think you don't have the digital Vcc connected to power supply - bad soldering? It would well explain such behavior.