Hi guys, for christmas i printed a statue and painted it for my parents. I want to put in a arduino nano with 1 LED and a light sensor. Basically, when its dark, the LED shines.
So now i want to give my parents the possibility that they can use batteries to power it. I bought a 2AA Battery Case, but putting these on the vin and ground pin dont give enough Volt. The LED on the Arduino Nano isnt bright, which tells me its not enough power. So i need 5V, thats why I bought this dc-dc converter to convert the 2 AA batteries to 5V. but whenever I use this, the LEDs on the Nano dont even power on. I tried all 5 of those converters to make sure i dont use a broken one. Can messure curents because I dont have such a current gauge yet. What am I missing?
Edit: Using the converter both ways, so battery in VOut+- and Nano in VIn+- and other way around doesnt change a thing.