Controlling two Servos breaks Bluetooth Connection

I am building a robot, and recently got servos for making the hands. The first servo I set up with near ease, and was able to control it over the bluetooth dongle I am using. When I tried my second servo, I was able to control it once before the bluetooth lost connection.

To diagnose the problem, the first thing I did was unplug the second servo. It works with no and one servo attached, but with two the bluetooth crashes.

I am using standard servos with the Servo.h library. All of my wiring is done on a breadboard, which I am sure is correct.

Do you think the problem could be due to the fact that I'm not providing an external power source for my servos?

michael-: Do you think the problem could be due to the fact that I'm not providing an external power source for my servos?

For certain. Your external power supply should be able to provide 1 ampere per straining servo.

So how many volts do you suggest I supply to the servos?

What servos do you have? Almost all work fine with 5 or 6 volts, but not much higher. When in doubt, look up the specs for your servos.