Using two power sources for my MKR1000 to UNO

Other Hardware General Electronics
1

Hello everyone,

I'm relatively new to electronics and how circuit analysis work so I come to you guys for guidance.

I'm doing a small project to aid a college organization I belong to with data analysis by making them a data logger.

Now, because I want to be able to record the input of the data and the time it was taken on an SD card I want to make sure the arduino stays on as long as possible even after a short black out so that the time won't be lost. I have with me an AC/DC converter I bought online that can be attached to the adapter of the MKR to Uno DC jack, but if power goes out, the arduino will turn off.

Is it possible for me to use the 9v battery adapter on the Vin pin to connect a battery and the DC jack at the same time without damaging the board?

Also, I want the arduino to use the battery only after the arduino loses power from the DC jack. Does the arduino board do it automatically? if not, how do I do this?

I've included images of the 9v battery adapter and the AC/DC adapter.

9 volt battery adapter.jpg
9 volt battery adapter.jpg900×1600 74.9 KB

power supply connected to MKR to Uno adapter.jpg
power supply connected to MKR to Uno adapter.jpg1390×1600 115 KB

2

Is it possible for me to use the 9v battery adapter on the Vin pin to connect a battery and the DC jack at the same time without damaging the board?

The board will not be damaged but your battery could burst into flames. Connect it through a seriese diode to stop the AC/DC trying to charge it.
This will work as long as your adapter has an output greater than your 9V battery.

Not sure what your title has to do with what you asked. Note you can not just connect a 5V signal output from an Arduino to your MKR1000.