Development of Electric Source Machine for Public Used

Background/Objectives: Running out of battery on phones, laptops and iPads while in public places is a problem that we are trying to avoid. Power consumption of smartphone and other mobile electronics applications is one of the major concerns due to the limited battery capacity. In public places, the grid power supply socket is difficult to find. This paper describes the development of the electric source vending machine for public used. Methods/Statistical Analysis: Development of this machine involves the structural mechanical design and electronic system. The photo sensor is used to detect the Light-Emitting Diode (LED) blinking from the digital electric meter to count the total power use by the different loads. Standard coin acceptor used to determine whether coins are genuine or counterfeit. Adruino microcontroller serves as the main system that controls and process the entire machine system. Findings: The systems are able produce stable 240 V AC and 5 V DC output voltage. Mobile electronic devices can use the electric source from the machine by connecting the adapter or Universal Serial Bus (USB) wire into the ports in the vending machine. Applications/Improvements: An electric source vending machine was developed. It can it can provide an electric source system in public places. This system provides a stable source of electrical 240 V AC and 5 V DC for charging various mobile electronic devices.