Slow Servo

Realistic flap and landing gear actuation.
This circuit slows the speed of a conventional proportional servo.
It regulates the time required for full servo rotation from 1 to 10 seconds without any reduction in the servo’s torque, and every servo position is possible (proportional).

Related Links
More Circuit about dc motor drive
More Circuit about Servo Circuit
DC Motor Driver with L6203
DC Motor Control with TIP31
DC Servo Motor Driver by PIC16C71

Read more original source:
http://www.speedy-bl.com/goslow-e.htm

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