How to power a GPS module, microcontroller and a modem installed in a car ?
I can use the car battery ( 12 V ) to supply the power but how would I go about to getting that power to the 3 portable devices that’ll be installed in the car ? GPS module takes 12v, microcontroller takes 5V and modem takes 3V.
Need a voltage regulator of some sort but not sure how to go about it.. ANY suggestions would be of great help.

