Leds using a old servo board question

[Krewmember]

Micro servos can draw up to 400 ~ 450mA and standard servos can draw up to 2.5 ~ 3A when stalled. Most LEDs draw 20mA, so doing some math 400mA / 20 = 20 we can determine that a micro servo control board could run about 20 LEDs and standard servos 2500mA / 20 = 125 Leds. As for the potentiometer it is just used for position feedback and does not limit voltage because servos use pulse width modulation to control motor speed. The common voltage for servos is 4.8 volts, depending on LED wavelength (Color) LED voltage can be between 1.8 and 3.3 volts so you will have to use a current limiting resistor. I cannot determine the resistors value without knowing how many LEDs you will have.




Shawn