Jerry – ForbiddenBit

Arduino Projects

iR Car Control Arduino

03/07/202003/07/2020 Jerry 0 Comments

The car is controlled by a remote control with four buttons: front, back, left and right,

Arduino Tutorials

DS18B20 Arduino Example

01/07/202017/09/2020 Jerry 0 Comments

DS18B20 is 1-Wire digital temperature sensor from Maxim IC. Reports degrees in Celsius from -55 to 125 ( /-0.5). Each

Electronics

NE555 Projects

16/06/202003/07/2020 Jerry 0 Comments

Traffic Light NE555: Flashing Railroad Lights: NE555 LED FLASHER NE555 Monostable NE555

Arduino Projects

Propeller Led Clock Arduino

31/05/202016/09/2020 Jerry 0 Comments

POV clock, consists of: Arduino nano, 8 LEDs and A3144 hall sensor. Arduino, based on information

Electronics

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

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

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();


}