Hi, I bought Arduino nano with Attiny88. When measuring the voltage between 5v ping and GND I get 1.8 volt.
Also when programming one of the digital pins to output High I get also 1.8 volt.
The board is powered from the USB and nothing is connected to it.
Any idea?
Sounds like you've cooked the onboard regulator.
I'm certain there is more to the story than what you have told us so far.
Perhaps elaborate a little more, show a circuit of how you connected everything and any code you've used.
Hi,
The issue repeats on 3 different boards.
I'm not connecting anything to the board.
If i'm programming the blink program the led on the board is blinking.
For some reason the 5V pin is showing only 1.8 volt (and also every other digital pin that i'm configuring to be digital pin output high
What exactly did you buy? Link please.
Thanks for the link.
How do you power the board? USB or external power supply (e.g. 9V).
Have you checked your multimeter against a known good 5V source?
Hi yes with USB.
When I'm working with arduino uno I can measure 5v with same multimemter.
The small IC close to the 5V and GND pins is the regulator: 78L05
The middle pin (2) and the back big pin are GND. The other other two should measure 5V. One is the input (3) of the regulator and the other the output (1).
I think that the 5V from the USB doesn't go through the regulator, but anyway you should have 5V in the output, coming from the usb. But if you power the Vin pin of the board with more than 5V then it should go through the regulator.
Then you could check in the USB connector directly if you have 5v, in the pins behind. And where it get lost.
And I think that the MCU alone can still (barely) work with 1.8V, that's why you can still program it, I suppose.
And if they are new and you just tested them, then return them.
On the regulator I do measure 5v
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