Description

Capacimeter with Arduino

A Capacimeter is an instrument used to measure the capacitance of a capacitor. In this tutorial, we will guide you step by step to build your own Capacimeter using an Arduino board, basic components, and some code.

More info and updates in https://rogerbit.com/wprb/2024/06/capacimetro/

Electronic components of the project

Arduino Nano

The Arduino Nano is a small, complete, breadboard-compatible board based on the ATmega328 (Arduino Nano 3.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It only lacks a DC power connector and works with a Mini-B USB cable instead of a standard one.

A socket for arduino

female pins

Male female dupont cables

Display oled sh1106

It is a 128x64 dot monochrome OLED display module with I2C interface. It has several advantages compared to LCD screens, and we can highlight its high brightness, very good contrast, a wider viewing angle, and low consumption. of energy. It is compatible with Arduino Rasberry Pi and PIC microcontrollers among others. It works with logic levels from 3.3V to 5V and has a viewing angle greater than 160 degrees. Screen Size is 1.3 inches. It is powered with a voltage of 3.3V to 5V. It can be used in applications such as smart watches, MP3s, thermometers, instruments, and various projects, etc.

Characteristics

Interface: I2C(3.3V / 5V logic level)

Resolution: 128 x 64

Angle of view: >160 degree

Display color: Blue

Display size: 1.3 inch

Driver IC: SH1106

Power supply: DC 3.3V~5V

Operating temperature: -20~70’C

Application: smart watch, MP3, thermometer, instruments, DIY projects, etc.

A KY-004 pulse module

PCB

electronic pcb diagram

Circuit

Code

Source code

C/C++

#include <Capacitor.h>
#include <U8glib.h>
#define PULSADOR_PIN 4  // Pin del pulsador
// Condensador en prueba.
// Ten en cuenta que para los electrolíticos el primer pin (en este caso D7)
// debe ser positivo, y el segundo (en este caso A2) negativo.
Capacitor condensador(7, A2);
// Configurar la pantalla OLED SH1106
U8GLIB_SH1106_128X64 oled(U8G_I2C_OPT_NONE);
void setup() {
  Serial.begin(9600);
  oled.setFont(u8g_font_6x10);  // Establecer la fuente para la pantalla OLED
  pinMode(PULSADOR_PIN, INPUT_PULLUP);  // Configurar el pin del pulsador como entrada con resistencia pull-up
  // Mostrar mensaje inicial en la pantalla OLED
  oled.firstPage();
  do {
    oled.drawStr(0, 20, "Apriete el boton");
    oled.drawStr(0, 40, "para leer el capacitor");
  } while (oled.nextPage());
}
void loop() {
  if (digitalRead(PULSADOR_PIN) == LOW) {  // Si el pulsador está presionado
    float capacitancia = condensador.Measure();  // Medir la capacitancia (en pF) 
    // Convertir capacitancia a nF y uF
    float capacitancia_nF = capacitancia / 1000.0;
    float capacitancia_uF = capacitancia / 1000000.0;
    // Imprimir en el Monitor Serie
    Serial.print("Capacitancia: ");
    Serial.print(capacitancia);
    Serial.print(" pF, ");
    Serial.print(capacitancia_nF, 3);
    Serial.print(" nF, ");
    Serial.print(capacitancia_uF, 6);
    Serial.println(" uF");
    // Dibujar en la pantalla OLED
    oled.firstPage();
    do {
      oled.drawStr(0, 10, "Capacitancia:");    
      // Mostrar en pF
      oled.setPrintPos(0, 30);  // Posición del texto
      oled.print(capacitancia);
      oled.print(" pF");
      // Mostrar en nF
      oled.setPrintPos(0, 45);  // Posición del texto
      oled.print(capacitancia_nF, 3);
      oled.print(" nF");
      // Mostrar en uF
      oled.setPrintPos(0, 60);  // Posición del texto
      oled.print(capacitancia_uF, 6);
      oled.print(" uF");
    } while (oled.nextPage());
    delay(1000);  // Esperar 1 segundo antes de permitir otra lectura
  }
}

Jun 19,2024

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Capacimeter with Arduino

A Capacimeter is an instrument used to measure the capacitance of a capacitor.

215

Published: Jun 19,2024

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