European Journal of Molecular & Clinical Medicine

Abstract

In this paper we present a Low Power ‘Pay Power’ Automatic Electronic Vending Machine design. A simple coin detection mechanism is employed to detect a coin of a single type and taking appropriate action using a PIC 16F877A microcontroller (switching a 230V power supply in this case).The programming process has been accomplished using standard application MPLAB IDE v7.60. PROTEUS v6.9 is used for simulating the entire system. The mechanical prototype to accept a coin has been ingeniously designed using a rectangular fiber case with metal detection terminals. The PIC microcontroller goes to low power ‘sleep’ mode when not in use there by conserving power. An experimental study at the end of the paper shows the amount of power saved