PV and Arduino based water temperature control system

PVAbstract: This paper discusses how Arduino and Photo Voltaic (PV) can be used to manage geyser water temperature. National grid power is used to raise the water temperature level from its minimum value to a maximum temperature of 50 ºC as determined by the geyser thermostat. Once the water temperature is at 50 ºC the Arduino’s software will switch the power source to a solar, which will then raise the water temperature further to a maximum of 72.5 ºC as determined by the installed thermocouple. The solar source consists of an installed 50 W solar panel, charge controller, solar battery, Thermoelectric Generators (TG) and a 600 W modified sine wave DC to AC inverter

Cloud for monitoring and logging solar energy and battery usage

Abstract: Data Acquisition Systems (DAS) can be used to gather changing energy parameters derived from various energy sources. This paper discusses how Arduino based data acquisition systems (DAS) can be used to gather solar energy samples and battery level information for remote monitoring and storage in the cloud. Arduino code was developed on Arduino IDE. An open source third party application was used to capture the Arduino serial transmitted values onto a Dropbox folder where it can be shared via Internet. Arduino hardware is connected to the four small 5 V, 1 W solar panels that are loaded with properly calculated resistors and a designed battery level sensor circuit. Solar energy values and battery usage pattern values were successfully stored into Dropbox for monitoring via cloud

Electronics I

Exam paper (Supplementary) for first semester National Diploma, Electrical and Computer Systems Engineerin