I am trying to power my arduino nano 33 IoT with an external battery pack. I am very new to microcontrollers and tinkering with them. I was thinking I could buy an external battery pack online with rechargeable Li-ion batteries and connect it to my arduino nano. The box says that the arduino nano 33 IoT operates at 3.3V so would two 1.5V batteries be enough to power the arduino? How would I go about connecting the battery pack to the Arduino? Is it as simple as connecting jumper wires to the arduino from the battery pack or would I need more equipment? If there are any videos/resources already available, feel free to link them.
The Nano 33 IoT and other chips on board require a steady power supply voltage within a narrow range. 1.5V alkaline batteries are not a good fit to that range.
You can use 2 to 4 alkaline batteries with an efficient 3.3V SEPIC (stepup/stepdown) converter like this one.
Some people use 3.7V LiPo batteries with a 3.3V step down converter like this one, but then you need a special LiPo charger.
3.3V power can be applied to the 3.3V pin.
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To use this method, would i need a breadboard and would I have to connect the battery pack, 3.3V SEPIC, and arduino to the breadboard?
No need for a breadboard, if you can solder wires to the converter module.
Soldering is a very useful skill in this hobby, and if you don't know how, Sparkfun and Adafruit have excellent tutorials on line.
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My remote controller (toy car on arduino) is based on an arduino 33IOT.
I choose to use a Lithium battery saved form an old phone.
the battery is mounted with a USB charger (TP-4056) and connected to a voltage regulator wich is setted up to output 5V.
a switch is welded between the battery and the voltage regulator, so I can use the TP-4056 when I want, and power up the arduino board only when needed (by triggering the switch).
excluding the switch and the battery model, it looks exactly like this:
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