Adjusted The Servo with IC 555

Servo is a device that is widely used to create a project, which is associated with movement, such as tool motion on the robot, each using a servo joints. Servo motor movement is more subtle than the dc or stepper motor movements.
Most servo has a work rate of 50Hz (20ms) at the point where a pulse between 1 and 2ms is used for command output to drive the servo. We can build a simple circuit to adjust the servo movement can be built using IC 555.

We must be very familiar about this IC, because IC is widely used in applications as an oscillation, wave generator, timer, etc..

By adjusting the potentiometer on the circuit above, a 555 timer IC can generate pulses every 20ms with a duty cycle of between 5% and 10% (1-2ms). This circuit operates at 5-6 V as adjusted by a servo which operates between 5 and 6 V. if it exceeds the rate, this voltage will damage the servo.

This is its the PCB layout.



List of Components :

IC1 = IC 555; C1= 1 uF/16V ; C2 & C4 = 100 nF (ceramic); C3 = 390 nF; P1= 5K; R1= 2,7K; R2 = 68K; D1 = 1N4148.

Posted in: Motors, Schematics, Servo