CONSTRUCTION AND DESIGN OF BATTERY LEVEL INDICATOR CIRCUIT

CHAPTER 1

The battery level indicator consists of very less component and thus occupies very little space of the surrounding. Since only DC input voltage levels are indicated, components which work in AC supply can be used to detect AC levels. Since AC voltage having continuously varying amplitudes the leds will turn ON and OFF continuously making a good looking pattern. Thus our battery level indicator can be used for decoration purpose also.

1.2 ADVANTAGES v  A battery level indicator is with electronic appliances to arrange as to display, on an indicator, a real time voltage detected by voltage indicator. v  Indicator indicates how much power the battery will be able to supply to electronic apparatus. v  It is used to check the battery level with the help of LED’s for example if three LED’s, indicates battery capacity of 30 percent. And if 10 LED’s glow then it is 100 percent. v  Easily indicate the battery level v  Enhanced version of this circuitry is the present mobile phone battery level indication system v  This circuit can be used in household applications like INVERTER. This circuit connected to inverter can help the users to know when to charge and when to leave the inverter idle v  Minimized version of this circuit can be also used for automobiles to indicate the battery level and low cost.

1.3 DISADVANTAGES v In case of voltage matching, correct level wouldn’t be indicated v 1f input voltage is higher than the calibrated voltage, for full scale input error will be shown.

1.4 FUTURE SCOPE

This project can be further extended in a useful manner, The basic design of battery level indication using single IC LM39 14 can be further improved by adding display control function and alert mechanisms to enable the easy knowing of the battery level. Instead of using the LED’S and LED controller in this circuit using a microcontroller can enable battery level indication as in mobile phones.

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