Sign in to follow this  

Why the board won't work normally if I pull out the USB?

Recommended Posts

I have bread boarded two Nano modules both have their own NRF24L0 radio. Both boards work perfectly when attached to a computer USB/power port.

Both talk back and forth sending and receiving data. Works great.

However if I pull out the USB/power cable from one board and supply 9 volts to Vin .... it won't transmit or receive anymore. I plug the USB/power/communications cable back in and everything is back to normal. I've even used a 120Vac to 5Vdc adapter with a USB output connector and same thing. Won't Transmit/or receive.

Any ideas?

Share this post

Link to post
Share on other sites


Questions about the nano devices really belong on the Terasic forum.  You're more likely to get a Nano engineer on that forum than on this one.

That said, were I you, I'd pull up the schematics and look at the power supplies.  Are they designed in order to able to handle a 9V battery, or do they need a 5V source?  Check your 9V with a voltmeter, does it have the charge you think it does?  etc., etc.


Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this