I searched but did not find, so, sorry for what is a newbie conumdrum.
My nano works fine with loading and running programs like BLINK using power coming in from the USB port.
But when I hooked it up on a breadboard to program an atTiny85, I discovered there is no +5 volts coming out of the +5v pin on the nano. It reads +0.36volts on my VOM.
Is this the way it is supposed to be?
Is it OK to attach a +12v supply to the VIN pin on the nano when using it as a programmer, and should I then be able to get +5v out the +5v pin on the nano to power the atTiny I want to program as well?
or
Do I need to use a +5v supply to power the nano (via +5v pin) and the atTiny?
And this won't drive a voltage into the USB port on my computer and damage anything, either, right?
mr coffee
When you have the Nano connected to the USB port and you see the Nano is running the Blink sketch and the LED is blinking, you do not get 5V between GND and 5V pins?
And when you connect 12V between VIN and GND and you see the Nano is running the Blink sketch and the LED is blinking, you do not get 5V between GND and 5V pins?
It should give you 5V in either of those wiring scenarios.
If you don't, questions come to mind: where do you have the ground lead of the VOM hooked up, or is the VOM on the right range, or do you have the header pins soldered to the Nano?
Thanks.
I measured right at the pins instead of on the breadboard, and it IS putting out +4.68 volts.
Breadboard problem. That I know how to fix!
mr coffee
Yes, new breadboard maybe. I think the slightly less than 5V like you are getting comes from the diode they put in the design to keep voltage you may supply to VIN or the 5V pin from going towards the computer's USB port.