Abstract
This paper outlines the analysis and development of a sunbathe laundry robot. The study explores the application of light dependent resistor (LDR) with PIC16F887. Two parameters that were studied include the response and sensitivity of LDR and water detection circuit to halogen lamp and amount of water on the detection circuit. The experimental setup for light detection measured via LDR and linked to a dc motor. A basic PWM configuration setting was developed and downloaded to PIC16F887 microcontroller to control the speed of the robot movement. The minimum speed was used to maintain robot stability. Voltage divider rule is applied on LDR to select the best resistor for ADC output. An L298 motor driver was interfaced to microcontroller board and motor to control the direction and speed of dc motor using PWM. The analysis shows that the best angle for LDR position is 45° while the voltage for the water detection circuit within the range of 0.58 V to 0.60 V.
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