[otw_is sidebar=otw-sidebar-1]Hi Friends! In this lesson, we will build a Capacitance Meter using Arduino. This circuit will be used to calculate a capacitance in the range of 1 to 4700 microfarad. So we will see the circuit diagram, principle of capacitance meter and also required component used in this project.
Arduino Based Capacitance Meter
Capacitance Meter, as the name proposes, is a component that is used to calculate the Capacitance of a Capacitor. A Capacitor is an electrical component that stores electric charge in it and this capability of the capacitor to save the electric charge is well known as Capacitance. SDMs cannot calculate the capacitance nut if we want to find the capacitance, you required to go for an advanced level, and find out the dedicated Capacitance device.
The dedicated capacitance meters typically comes with a longer range of measurements of dissimilar parameters like Capacitance, resistance, inductance transistor etc.
Components Required
Arduino
LCD
Resistor
Capacitance
Lm316
Circuit Diagram
In this project, first we have to make a connection of this circuit. LCD 16*2 display pin Rs and E are connected to Arduino 15. The data pin of LCD D5 to D7 is connected to Arduino 3 to 6. On the other hand LM316L pins 3 are attached with arduino pin 2 and the rest of the LM316L pin is attached with resistors. R2 resistor is also connected with capacitance.
Working Principles
Before describing the working of the project, we will see the principle behind this technique of capacitance measurement.
The working principle is Time Constant. Time Constant (τ) of a capacitor is defined as the time takes to fully charge the capacitor to discharge to 36.8% of its maximum voltage passing through a resistor. Smaller capacitors will have less time constant and takes less time to charge. On the other hand, larger capacitors will have greater time constants.
τ = R * C
Here, τ is the time constant of Capacitor, C is the Capacitance of the Capacitor and R is the Resistance of the Resistor.
Application
- Capacitance Meter can be utilized to calculate the capacitors.
- Using Arduino for Capacitance Meter makes it easy to execute the project and with slight modifications, the circuit can be build for a large range of capacitors.
So guys, I hope today’s topic is very helpful for understanding the concept of capacitance.
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