Ardiono mega shield for servos

i am working on servo shield for the arduino mega where i can connect up to 18 servos. How much power can i connect to the 5volt on the board, or do I need to use an external powersupply for the servos?


I’d advise always using an external supply for any number of servos - even just one!

I agree, powering servos from the Arduino’s internal 5vdc power is just asking for problems with over current draw and motor noise.