Development ofCounter Based Digital Capacitance Meter Implementation using Synchronized Relaxation Oscillator

A digital capacitance meter is a piece of electronic test equipment used to measure capacitance mostly of discrete capacitors. This project presents the design and implementation asynchronous digital capacitance meter using principle that when capacitor is connected across constant DC source, it charges at an exponential rate which dependent on seen by source as well resistance in circuit. In this research, unknown whose be determined was used timing circuit 555-timer base monostable (One-shot) multivibrator give out single pulse ON duration function capacitor. synchronized reference clock frequency 7.2kHz positive edge-triggered D flip-flop count enable signal decade counter ensure stopped whenever reaches The device tested different capacitors (both electrolytic ceramic) results measurement show able measure precisely within their dynamic range values.