HARDWARE PROTOTYPE
30
AEIE, RCCIIT
DC motor has the characteristics of low power consumption, large torque, low noise, small size,
light weight, and easy to use. The DC motor used as actuator in the system has
maximum angular
speed of 10 rpm and 12 V of voltage supply. It is can move or rotate smoothly, as shown in Figure
4.2. Direction and speed of the DC motor represent plant outputs. In this case, the direction of DC
motor can be set using the motor driver module, namely L293D. As stated previously that the DC
motor will be in off -mode when the difference in the intensity of both two LDRs received are
small (< 0.1 volt). This value is based on the
experiment results and is intended to avoid oscillation.
Figure 4.4: DC Motor
HARDWARE PROTOTYPE
31
AEIE, RCCIIT
4.1.4 Mechanical Structure
The mechanical structure, uses steel rods to create two pillars of support for the solar panel. One
of the pillars supports uses two rods of length 30 cm, while the other one is supported by two rods
of 46cm each. The structure utilizes a rod of length 40cm as the rotational axis. The floor of the
structure is made of a rectangular wooden base of cross-section 39.5cm x 21.8cm. The solar panel
used is the project is 18.4 wide and has a length of 29.1cm.
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