I am new to electronics and would like to design a PCB that uses an Atmel microcontroller, and powers three servos. I was thinking of designing the PCB with a single power supply.
The servos I have can draw up to 500mA of current each, when fully loaded. If I use a 5V 1.5A supply (VCC), and connect the servos and the microcontroller in parallel to VCC I understand all sources will get 5 volts. But will they each only draw the current they need?
The Atmel microcontroller datasheet says it should only take a max of 200mA, so would I need to place a current limiting resistor? Or do I need to create a current divider circuit to fix the current flows to each unit? But the motor current draws can change depending on the load and it seems like it might be wasteful (?) to have resistors burning power if its not always necessary.