Current energy from sun made a significant contribution in the electricity manufacturing industry in Thailand. However the potential application of solar energy are at the low level. The agency will need to make solar energy perpendicular to the sun as much as possible. Therefore the invention of the light experimental set for two-axis motion to identify the vertical axis was done to compare the value of Light Dependent Resistor to locate the origin of the light and can be applied to the real work in the future.

This paper presents the development of a data logger which collects interesting data via low rate wireless sensor network not expensive low power consumed sensor node. The system is wireless and more flexible to expand and substitute sensor nodes by add proper configuration wireless sensor node. System controller uses embedded small multi-code microcontroller Propeller Chip by Parrallax Inc. This chip contains eight processors (Cogs) inside. All eight processors can perform tasks simultaneously or with coordination from other processors. It comprised of Xbee chip to perform wireless sensor network that work with 802.15.4 protocol. Data is collected and stored in Micro SD memory small size and not expensive. It transfer data from data logger to master computer system via wireless network. The experimental results show that we can use single microcontroller based on data logger system small size and flexible. To expand this system with Propeller chip it can monitor data collected by system directly from this chip by generating computer screen monitor signal.

The objective of this study was implementation of microcontroller to construct Appl to control the operation of the Dog food exchange machine using plastic bottles system. To study an operation control of microcontroller system operation and the to create construction of a Dog food exchange machine using plastic bottles. The component of Dog food exchange machine using plastic bottles are divided into 3 parts: 1) parts of detecting plastic bottles sensor 2) part of the motor control 3) part of the vending machine. Results of the study of Dog food exchange machine using plastic bottles. used in 2 ways: 1) plastic bottle vending 2) coin vending for 10 baht. When the total number of bottles is set at 15 bottles the plastic bottle vending machine will not work until the Reset button is pressed. Can still work normally

This research is to study and develop a DC motor speed control by using Visual Basic.Net 2008 in computer programming to use the computer and the microcontroller is processing from computer via the serial port. So that a signal to the motor driver circuit motor speed work as assigned. By the speed can be entered via the computer screen is measured in rpm. and motor control to control the PWM (Pulse Width Modulation) control circuit and the principles of the hardware by using the digital output signal of the microcontroller control Motor speed can be configured to be from 100 to 3000 rpm. And the motor starts to spin at maximum speed and then gradually reduce the speed down to the specified value. Control both the speed and the average error of 4.6% compared to the speed measurement using infrared light. And found that at speeds below 100 rpm. to a maximum error of 12% and the error decreases when the speed increases. The error value is at least 2000 rpm. and 3000 rpm the speed error is 0.5%