I have a device that uses 3 AA batteries and I would like to power it from a USB port instead.
As I understand I will have to use resistors but I have no idea on which ones.
I have found the following calculator: Voltage Divider Calculator
While it does its work, the wiring shown in diagram is quite confusing:
I guess this is some logical schema rather than real wiring schema.
What resistor values do I need to get ~3.6V from a 5V USB port, and how should I wire them ?
Is there a better way than using resistors to get 3.6V from 5V?