Circuitry

Battery Level Indicator

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

Automatic lamp

you see the street light turn on in evening and turn off in the morning automatically. how this all come true? the circuit described below gives the correct explanation of your question.the circuit uses the output from LM324 to drive the relay which can be further coupled to on/off bulb.

PROTEUS DESIGN

RC CAR(wireless)

RF communication is widely used in different application like robotic and other automation system. in this tutorial we will learn to drive dc motor from remote place by using rf module

TRANSMITTER

Room heater

this is simple project with build in ability to turn the heater on whenever room temperature goes down below 18 degree Celsius.

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