Sadly you may have damaged your servos as they are typically rated as requireing 4.5 to 6 volts, with 6 volts as a maximum. 7.5vdc may have been too much.
Lefty
Sadly you may have damaged your servos as they are typically rated as requireing 4.5 to 6 volts, with 6 volts as a maximum. 7.5vdc may have been too much.
Lefty