With the increase on the number of vehicles on the streets comes the need for more parking spaces. Many car owners decide its best to leave their car unattended in public areas, but this decision contributes to the growth in the occurrences of vehicle theft. This paper proposes the development of a sentinel device based on the Arduino platform that will be able to detect movement inside a vehicle and send a warning to the owner through the GSM network using any Android based phone.

The use of IV gravity sets for infusion is outspread around the world. This paper presents a method of drip count measurement based on an infrared LED and phototransistors receptors as well as signal analysis of the waveform produced by a passing drop by such receptors. Furthermore, this article also presents the steps taken for the development of a physical apparatus which can be connected to any IV gravity set.