Servo Motor Control Using NE555

Servo motors are used in that applications where accurate and controlled movement is essential such as robotics,Remote-Controlled Car,automation systems.Servo motors are controlled using a Servo Motor Controller or a Microcontroller which provides precise control over the servo's position.However, servo motor also Control using NE555 timer IC.NE555 timer IC is generating pulse-width modulation (PWM) signals, making it suitable for servo motor control.

 

 

 

In this Blog Post,we diascus about detailed explanation of a servo motor control circuit using the NE555 timer IC,along with complete circuit diagram. 

Overview of a Servo Motor

Servo motor use PWM signal for operate at various speeds. This motor provide precise control over the amount of torque. Internal control circuit of servo interprets this signal and adjusts the motor's position accordingly. Servo Motor is use for high precise control of angular position with low tolerance. Servo Motor can rotate maximum of 180 degrees, either 90 degrees clockwise or 90 degrees anticlockwise from its neutral position.

Characteristics of Servo Motor

Motor-Servo Motors are Usually a DC motors.
Gears- Servo motors have Internal gears mechanism that reduce the motor's high-speed rotation to a lower rotation, increases the torque & accuracy of the motor.
Control Circuit- The controller takes PWM signals and adjusts the motor's position based on the desired angle.
Feedback System-This system monitors the motor's current position and provides feedback to the control system by using an encoder.3

Power Supply-3.7V to 6V for mini servos.

Wire Configuration Of Servo Motor

Yellow: Connected to PWM source.

Red: Connected to positive of the supply.

Brown: Connected to negative of the supply.

NE555 IC Overview

The NE555 IC commonly used in various electronic circuits for generating timing signals, pulse generation, oscillation and more.

 

Pin Configuration of NE555 IC

Pin 1: Ground
- Connect with ground of the power supply.
Pin 2: Trigger
- Input pin in monostable mode for triggering the timer .
- Used for control the charging of the external timing capacitor in adjustable mode .
Pin 3: Output Pin
- Produces a square wave output in adjustable mode.
- Produces timing pulse in monostable mode.
Pin 4: Reset
- Connect to ground for reset the timer.
Pin 5: Control Voltage
- Control the Threshold and Trigger Voltages.
Pin 6:Threshold
- In monostable mode control The input timing
- In adjustable mode used for set the upper threshold voltage.
Pin 7:Discharge
- In adjustable mode Connects to an external resistor for discharge timing capacitor .
- In monostable mode discharge the timing capacitor during the timing cycle .
Pin 8: VCC
- Connect to the positive supply voltage.

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Components Required for Servo Motor Control Circuit Using NE555 IC 

Polyester Film Capacitor
⇒0.1 μf (104)-1 pcs
Resistors
⇒1KΩ-1 pcs
⇒10KΩ-1 pcs
⇒220KΩ-1 pcs
Diode
⇒IN4007-1 pcs
Preset
⇒50KΩ-1 pcs
Led
⇒3mm Led-1 pcs
Power Supply
⇒3.7 V DC

Complete Circuit Diagram of Servo Motor Control Using NE555

 

Click on the Download buttons to download the Circuit Diagram of Servo Motor Control Using NE555

Operation of Servo Motor Control Using NE555 Circuit

NE555 Timer IC is configured in astable mode to function as an oscillator, producing a continuous square wave output. In this mode, the NE555 alternates between high and low states, creating a pulse-width modulated (PWM) signal.

 

The potentiometer is used to adjust the resistance in the circuit, effectively modifying the duty cycle of the PWM signal. By turning the potentiometer, you can control the position of the servo motor. The varying resistance alters the charging and discharging times of the timing components in the NE555 circuit, influencing the width of the pulses generated.

 

Step by step video tutorial of Servo Motor Control Using NE555

 

Complete setup of Servo Motor Control Using NE555

This circuit is very simple yet and provides effective way to control a servo motor using the NE555 timer IC.

 

 

 

When connect 3.7V DC power to the circuit, the NE555 generate PWM signals on Output pin, which is use for control the servo motor's position. Adjusting the potentiometer modifying the duty cycle of the PWM signal & it determine the position of Servo Motor.

 

Note-This circuit can't be able to achieve specific angles of rotation. For getting precision and accuracy of the Servo Motor use Servo Motor Controllers or Microcontrollers.

 

Frequently Asked Questions

How Servo motor is controlled by a NE555 timer IC?

The NE555 timer IC generating pulse-width modulation (PWM) signals.The duration of the pulses in the PWM signal determines the position of the servo motor.

How does the NE555 generate a PWM signal?

The NE555,configured in astable mode,functions as an oscillator.It alternates between high and low states, creating a continuous square wave output.

How to Control a Servo Motor using a potentiometer ?

The potentiometer adjusts the resistance in the circuit that influencing the duty cycle of the PWM signal of NE555 IC.By turning the potentiometer,we can control the servo motor position, as the duty cycle determines the width of the pulses.

 

 

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