|
arduino-nano-v3 |
x 1 | |
|
SH1106 od SSD1306 Oled display 128x64 |
x 1 | |
|
Cheap Infrared sensor module |
x 1 |
|
Soldering Iron Kit |
Arduino Tachometer (RPM meter) with IR sensor module
A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on Analogue dial, or on digital display. In this project, tachometer is made using an IR Sensor module as unit for measuring the number of rotations.
Simply we have interfaced the IR sensor module with Arduino nano and the SH1106 Oled display. The sensor module consists of IR Transmitter & Receiver in a single pair that can work as a Digital Tachometer for speed measurement of any rotating object.
One diode transmits IR rays which reflect back to the receiver diode and then IR Module generates an output or pulse which is detected by the Arduino controller.
Arduino calculates RPM for a minute using the given formula:
rpm = (objects / 3.0)*60;
because in our case we have 3 obstacles (objects) in one full circle
The device is very simple to build and consists of several components:
- Arduino Nano microcontroller
- IR sensor module
- and SH1106(or SSD1306) Oled display
If you want to make a PCB for this project, or for any other electronic project, PCBway (www.pcbway.com) is a great choice for you. PCBway is one of the most experienced PCB manufacturing company in China in field of PCB prototype and fabrication. They provide completed PCB assembly service with worldwide free shipping , and ISO9001 quality control system. Also, on their site there is an online gerber viewer where you can upload your gerber and drill files to render your board.
Let me mention that instead of SH1106, an SSD1306 OLED display can be used, so in the code everywhere you simply need to replace SH1106 with SSD1306.
When measuring, we need to place the sensor at a certain distance from the rotating object, and this distance can be defined by the trimmer potentiometer on the IR module. In this case, I will measure the RPM of two small Stirling engines, as well as one PC power supply fan.
By the way, in the description of the construction of the device, there are also brief instructions for assembling the high-temperature Stirling engine.
Immediately after starting the device, my logo appears on the screen, and after a few seconds the measurement can begin. It is useful to know that any image can be converted into a C code array using special programs for this purpose, and even online.
For greater visibility, a progress bar proportional to the number of revolutions appears on the upper part of the screen . Depending on the range of values for which we will use the tachometer, in a part of the code:
display.fillRect(0,4, map(rpm, 0, 1000, 0, 128), 8,WHITE);
another value can also be mapped.
First, we measure the rotational speed of a low temperature Stirling engine. This machine has 6 obstacles so we adjust the arduino code accordingly
rpm = (objects / 6.0)*60;
For this machine to work, the cup must be filled with boiling water.
Next, we measure the rotational speed of a high-temperature Stirling engine.
And finally, we measure the rotation speed of the PC fan.
The device is built into a suitable box made of 5 mm PVC board, covered with self-adhesive colored wallpaper. In fact, I used the box from one of my previous projects, so the light sensor and the button have no function in this specific project.
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SH1106.h>
#define OLED_RESET 4
Adafruit_SH1106 display(OLED_RESET);
#define sensor 2
const unsigned char zmaj [] PROGMEM = {
// 'zmaj7 60x60, 128x64px
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x80, 0x00, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0x00, 0x00, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x04, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x0c, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x80, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x40, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x80, 0x60, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x80, 0x30, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xe2, 0x3f, 0xfa, 0x80, 0x0f, 0xcf, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xed, 0xbf, 0xf4, 0x80, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xd9, 0x3f, 0xe9, 0x80, 0x00, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xa2, 0xff, 0xd3, 0x00, 0xff, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xff, 0xa6, 0x01, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xff, 0x4c, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xfe, 0x98, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xfd, 0x30, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0x82, 0x02, 0x60, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xa1, 0xfc, 0x80, 0x01, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xd0, 0x41, 0x80, 0x00, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xe8, 0xbe, 0x00, 0x04, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xf4, 0x40, 0x00, 0x0b, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x05, 0x23, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x47, 0xcf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x87, 0x8f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0x00, 0x00, 0x8b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x80, 0x00, 0x97, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x4c, 0x01, 0xaf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xa6, 0x03, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xd3, 0x04, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe9, 0x8c, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf4, 0x88, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x90, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x90, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x8a, 0x05, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x87, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x01, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf9, 0x00, 0x81, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0xff, 0x9f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
int rpm = 0;
//int pid;
unsigned long millisBefore;
volatile int objects;
void setup()
{
Serial.begin(9600);
display.begin(SH1106_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3D (for the 128x64).
attachInterrupt(digitalPinToInterrupt(2), count, FALLING);
delay(1000);
display.clearDisplay();
display.drawBitmap(0, 0,zmaj, 128, 64, WHITE); // display.drawBitmap(x position, y position, bitmap data, bitmap width, bitmap height, color)
display.display();
delay(2000);
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(22,10);
display.println("mircemk");// Print text
display.setCursor(10,40);
display.println("RPM METER");
display.display();
delay(2000);
pinMode(2, INPUT);
}
void loop()
{
print_to_OLED();
if (millis() - millisBefore > 1000) {
rpm = (objects / 3.0)*60;
objects = 0;
millisBefore = millis();
}
delay(100);
display.fillRect(0, 4, 128, 12,BLACK);
display.fillRect(0,4, map(rpm, 0, 1000, 0, 128), 8,WHITE);
display.display();
}
void print_to_OLED() {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(13,20);
display.println("RPM:");
display.setCursor(70,45);
display.println(rpm);
display.display();
}
void count() {
objects++;
}
Arduino Tachometer (RPM meter) with IR sensor module
- Comments(0)
- Likes(0)
- 0 USER VOTES
- YOUR VOTE 0.00 0.00
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
More by Mirko Pavleski
- Arduino FFT Audio Spectrum analyzer on 8x32 color matrix WS2812B The spectrum analyzer displays the amplitude of signals as a function of frequency, allowing engine...
- Unusual Led Ring Arduino Clock, Temperature, and Humidity meter There are many arduino clock projects with temperature and humidity readings where the results are ...
- How to make simple portable PEMF Magnetic Pulser PEMF (Pulsed Electromagnetic Field Therapy), which is also known as magnetic pulse therapy uses ele...
- Single Mosfet Mini SSTC Tesla coil with 10 + cm Spark A Solid State Tesla Coil (SSTC) is a type of Tesla coil that uses solid-state components such as tr...
- How to Make EM84 (6E2) Vacuum Tube Stereo VU Meter A VU meter, also known as a Volume Unit meter, is a device used to display the audio signal level ...
- Universal Arduino Staccato controller for SSTC and VTCC Tesla Coils The VTTC Staccato Controller was developed in the attempt to create longer sparks from VTTCs while ...
- DIY extremly Sensitive and cheap Arduino Seismometer A seismometer, is an instrument used to detect and record ground motion caused by seismic waves, su...
- DIY Extremly Sensitive and cheap Geophone sensor for Earthquakes detecting A geophone is a device used in geophysics to detect ground movement. It is specifically designed to...
- Arduino FFT Spectrum analyzer on VFD display GP1287 An audio spectrum analyzer is a device that visualizes the frequency content of an audio signal. It...
- DIY simple Spark Gap Tesla Coil Tesla coil is a type of resonant transformer circuit invented by Nikola Tesla around 1891. It is a ...
- DIY PC controlled high power PEMF Therapy Device PEMF or Pulsed Electromagnetic Field therapy is a type of therapy that uses electromagnetic fields ...
- DIY Precise Arduino Miliohmmeter In practice, we very often need to measure low resistances. Measuring low-value resistances, especi...
- The simplest way to determine the quality of lighting in your home - bulb flickering meter Light flickering can be a common issue and may occur with various types of bulbs, including incande...
- Classic Style Arduino Weather Station with three Oled Displays So far I have made several weather stations that display local values as well as internet data, whic...
- How to build simple cheap Hulda Clark Syncrometer Hulda Clark's Syncrometer was a device she claimed could detect the presence of various substances ...
- DIY simplest small CRT Oscilloscope An oscilloscope is a measuring instrument used to visualize and analyze electronic signals. It is c...
- Arduino Door Lock with Smartphone Flashlight Login (Li-Fi project) There are many different arduino door lock projects, where the access method is using a keyboard, R...
- Arduino Bar graph Stereo VU meter on VFD display GP1287 A VU meter, also known as a Volume Unit meter, is a device used to display the audio signal level i...
-
Open Source Very Large Stick - Freejoy & MMjoy2 breakout board
334 0 0 -
RF Control training board for students based on ESP32 C3
454 0 2 -
Aquarius+ Computer, Standard PCB
649 0 3 -
KINETIC COASTERS with a TWIST! Laser or 3D Print some DIY Magic
473 0 1 -
RPI - 8 IO PLC With ATTiny85 Watch Dog
415 0 0 -
Nintendo Famicom HVC-001 Controller Shells
511 0 1 -
COMMODORE 128 DIAGNOSTIC REV.785260 KEYBOARD DONGLE
488 0 4 -
COMMODORE 128 15KHz DISPLAY ADAPTER (C128 80 COLUMN ADAPTER)
619 1 4 -