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Arduino-based Capacitance meter.

Capacitance meter, Arduino-based, three tests , range 18pf to 4F , Push Button input , OLED and serial monitor output.

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Capacitance meter, Arduino-based,
three tests , range 18pf to 4F , Push Button input , OLED and serial monitor output.

The meter measures capacitance it outputs to an OLED and serial monitor. (The OLED is optional as data via serial monitor on a PC) Three push buttons start the three tests respectively.

Test 1 Range 1 uF to 4F.
Test 2 Range 18 pF to 470 uF.
Test 3 Range 4.7 nF to 180 uF.

The on-board LED of nano module D13 is used as Status LED. It Flashes during startup, stays on during "READY to test" state and goes off during "TESTING" state

The OLED displays brief help message and title screen duirng start-up

Each Arduino capacitance meter relies on a property of resistor capacitor (RC) circuits- the time constant. The time constant of an RC circuit is defined as the time it takes for the voltage across the capacitor to reach 63.2% of its voltage when fully charged:

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Alexander wrote 02/26/2019 at 07:50 • point

Great project! When I was in college, I developed a similar project for measuring resistance, using Wheatstone bridges and some ADCs/op-amps. At the time I considered measuring capacitance and inductance but never got around to it. It's awesome to see people building devices like this!

Bravo!

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