Video 20: Controlling Position of a Servo With a Potentiometer¶
This video demonstrates how to control servo position using a potentiometer and Raspberry Pi GPIO, including explanations of circuit setup, Python coding, ADC, PWM, mathematical calculations, error handling, and the importance of connections.
Circuit Setup: Review of the previous lesson’s analog input circuit using the ADC0834 for Raspberry Pi.
Servo Setup: Instructions for setting up the servo in the circuit, including wiring and power considerations.
Understanding ADC and PWM: Get familiar with the concepts of Analog-to-Digital Converter (ADC) and Pulse Width Modulation (PWM).
Reading analog signals: Discover how to read analog signals from a potentiometer connected to the Raspberry Pi.
Calculating PWM percentage: Learn the formula to calculate the PWM percentage based on the analog signal value obtained.
Controlling a servo motor: Explore the process of applying the calculated PWM percentage to control the position of a servo motor.
Synchronization: Ensure synchronization between the potentiometer’s position and the servo motor’s position for accurate control.
Mathematical Calculations: Explanation of the mathematical calculations used to determine PWM values based on potentiometer readings.
Error Handling: Implementation of try-except blocks for program termination and GPIO cleanup.
Importance of connections: Understand the significance of establishing reliable connections for precise readings and outputs.
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