I have an **Arduino Uno** *(a SainSmart model, actually)*. I intend to power it with three 1.5V batteries. I measured them and they yield 4.67V in total. The Arduino requires 5V.

# The question is, if the arduino will work this way.

I'm not powering complicated microcontroller components here. These components are used:

* A buzzer
* An LED
* A unit of 4 seven segment displays
* A couple of buttons as input elements

If the volume or brightness of these components is slightly decreased, it doesn't matter at all. But I would like to know if it will work in the first place.

# And also...

Where exactly do I plug the power source in? The power jack, the USB jack, pins, somewhere else?


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**The schematic looks like this**, just to illustrate it. I'm not a good drawer, but you'll get the idea...

[![schematic][1]][1]


  [1]: https://i.sstatic.net/6OazX.png