Jerry – ForbiddenBit

Levitron

23/05/202023/05/2020 Jerry

So the idea of device is very simple, the electromagnet lift into the air a piece of magnet.When current

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Arduino Projects

MultiMeter Arduino nano and OLED i2c 0.96″

23/05/202023/05/2020 Jerry

Hi, every electronics needs a multimeter, you can buy it or make it yourself at home. Today I will show

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Arduino Projects

Tachometer / RPM Measure

23/05/202023/05/2020 Jerry 0 Comments

List Elements: Arduino Nano Display old i2c 0.96″ Hall Effect Sensor A3144 BreadBoard Wires

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

Adafruit_SSD1306 display(4);

float value=0;
float rev=0;
int rpm,count=0;
int oldtime=0;
int time;

void isr() //interrupt service routine
{
rev++;
count++;
}

void setup() {

display.begin(SSD1306_SWITCHCAPVCC,0x3C);

display.clearDisplay();
attachInterrupt(0,isr,RISING);  //attaching the interrupt

}

void loop() {

delay(1000);
detachInterrupt(0);           //detaches the interrupt
time=millis()-oldtime;        //finds the time 
rpm=(rev/time)*60000;         //calculates rpm
oldtime=millis();             //saves the current time
rev=0;

attachInterrupt(0,isr,RISING);


  
display.clearDisplay();
display.setTextSize(2);
display.setCursor(0,0);
display.println("COUNT");
display.setCursor(70,0);
display.println(count);
display.setTextSize(3);
display.setTextColor(WHITE); 
display.setCursor(34,20);
display.println("RPM:");
display.setTextSize(2);
display.setCursor(40,48);
display.println(rpm);
display.display();


}

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#include <SPI.h>

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

Adafruit_SSD1306 display(4);

float value=0;

float rev=0;

int rpm,count=0;

int oldtime=0;

int time;

void isr() //interrupt service routine

{

rev++;

count++;

}

void setup() {

display.begin(SSD1306_SWITCHCAPVCC,0x3C);

display.clearDisplay();

attachInterrupt(0,isr,RISING); //attaching the interrupt

}

void loop() {

delay(1000);

detachInterrupt(0); //detaches the interrupt

time=millis()-oldtime; //finds the time

rpm=(rev/time)*60000; //calculates rpm

oldtime=millis(); //saves the current time

rev=0;

attachInterrupt(0,isr,RISING);

display.clearDisplay();

display.setTextSize(2);

display.setCursor(0,0);

display.println("COUNT");

display.setCursor(70,0);

display.println(count);

display.setTextSize(3);

display.setTextColor(WHITE);

display.setCursor(34,20);

display.println("RPM:");

display.setTextSize(2);

display.setCursor(40,48);

display.println(rpm);

display.display();

}

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Arduino Tutorials

A3144 Hall Effect Sensor

23/05/202023/05/2020 Jerry a3144, hall sensor

A Hall effect sensor is a device that is used to measure the magnitude

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Covid-19 Tracker

28/04/202028/04/2020 Jerry 0 Comments

You don’t have to watch TV to know what the situation is in your country. In

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NodeMCU and 1.8″ SPI ST7735 display

27/04/202028/04/2020 Jerry 0 Comments

I am using the 1.8″ color ST7735 TFT display a lot. The reason for that is that this display is

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Start with NodeMCU

26/04/202028/04/2020 Jerry 0 Comments

NODEmcu is an inexpensive WiFi module that enables makers and entrepreneurs to develop

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Weather Station NODEmcu i2c HD44780

21/04/202025/04/2020 Jerry 0 Comments esp8266, nodemcu, station, weather

Do you want to know the current weather? This article will show

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Arduino Projects

Gesture Control Car MPU6050 and NRF24L01

30/03/202030/03/2020 Jerry 0 Comments Arduino, l298n, mpu6050, nrf24l01, rc

The gesture control robot is popular common type of

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Arduino Game Arduino Projects

Kart Race Game

22/03/202024/03/2020 Jerry 5110, Arduino, game

Kart Race Game is a perfect project for beginners who are just starting their

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