indicator

Battery Level Indicator

Gargi-arya's picture
Submitted by Gargi-arya on Thu, 10/09/2014 - 12:49

INTRODUCTION

Battery level indicator  based on lm3914 IC (Integrated chip) indicates the status of the battery by glowing LED’s. For example six LED’s are glowing means battery capacity 60% remains. It can be used to check car battery or inverter. The IC LM3914 takes input analog voltage and drives 10 LED’s linearly according to the increasing/decreasing input analog voltage.

CIRCUIT DIAGRAM

water level indicator

Submitted by staff member on Fri, 09/26/2014 - 22:42

this article  illustrates the working of water level indicator.water tank that is usually placed at the top of multistory building are difficult to monitor manually,the user can configure the water level according to need thus avoid unnecessary spillage of water. as we know water conducts electricity,this principle can be used to construct the circuit.

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