The construction of the device uses PIC16F676 for reading analog signal such as voltage, and displaying the 3-digit output by using 7-segment LED.
The circuit was developed to create a voltmeter that will be used to test car batteries while showing an indication using LEDs.
The circuit has been designed to provide an alarm with the use of a buzzer when sensing high temperature by using a thermistor.
The circuits were designed using two A/D converters to create a voltmeter and ampermeter.
The simple circuit is used to illustrate the method of measuring the amount of AC magnetic and electric fields or the extremely low frequency fields in a workplace or home environment.
The circuit is designed to produce a temperature monitoring scheme using an operational amplifier and a relay with triggering procedures.
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