I want to add 4 LEDs in a series circuit to 4WD Romeo Uno Mobile Platform Robot.
Do I need another power supply ( 9 volts ) to turn ON and OFF these 4 LEDs?
These 4 LEDs are for looks to dress up the Romeo Robot.
If I need another power supply, could I hook up the Romeo Robot and the 4 LEDs series circuit to a DPDT toggle switch?
Would the DPDT toggle switch do a good job turning both devices or circuits ON and OFF?
Please send reply!