Digital Voltmeter with 3-Digit Output by PIC16F676

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.

Car Battery Voltmeter with LED Indicator

The circuit was developed to create a voltmeter that will be used to test car batteries while showing an indication using LEDs.

Alarm Indicator for High Temperature Reading

The circuit has been designed to provide an alarm with the use of a buzzer when sensing high temperature by using a thermistor.

Digital Voltmeter and Ammeter Using CA3161E and CA3162E

The circuits were designed using two A/D converters to create a voltmeter and ampermeter.

ELF AC Milligauss Meter

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.

Monitoring and Detection of Temperature

The circuit is designed to produce a temperature monitoring scheme using an operational amplifier and a relay with triggering procedures.