Posts with «arduino projects» label

Temperature based fan speed control using arduino uno and lm35

In this post, we will make a temperature based fan control using arduino and lm35. LM35 is temperature sensor, whose output is analog (linear). Arduino uno has six channle of adc (A0-A5)
and adc is of 10-bit

Stuff required:
  • Arduino UNO
  • LM35
  • LCD 16*2
  • POT 10k
  • Motor driver (L293D)
  • DC motor

Circuit Diagram

Resolution = Vref/((2^n)-1)  = 5000 (in mV)/1023   [2^10-1]

that comes out to be, 4.887 millivolts

For temperature calculation, Voltage (in millivolts)/10    [Sensitivity is 10mV per degree Celsius]

Source Code:

Download source code from link below


Watch the Video:







Temperature logger using arduino and thingspeak

Hello Arduino lovers,

In this tutorial, we are making a temperature logger using arduino and thingspeak.
Let's start

Things required:

  1. Arduino Uno
  2. LM35
  3. Sim900 module
  4. Internet pack 
  5. Thinkspeak account




Make connections as given in the diagram. Connect Tx of GSM module to pin number 7 of arduino board and Rx of of GSM module to pin number 8 of arduino uno and ground should be common between these two.
Output of LM35 should be connected to A0 of arduino board.
Arduino Uno GSM module LM35
Pin no. 7 Tx
Pin no. 8 Rx
Pin no. A0 Output of Lm35
Download code from link below
Now, upload the code

Video:

Hope, you guys had enjoyed the video

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Arduino knight rider circuit using led bargraph

In this post, we are going to make knight rider circuit using led bargraph. Led graph, it consists of 10 leds.

Stuff required:

  1. Arduino uno
  2. LED bargraph
  3. 220 ohm resistor
  4. connecting wires
Connections:

First of all, make connections as given in the diagram below:

connections
Source code:

Upload the code below to your arduino board

/* Code starts from here */

const int led[]={4,5,6,7,8,9,10,11,12,13},d=5;

void setup() {
  for(int i=0;i<10;i++)
    pinMode(led[i],OUTPUT);
}

void loop() {
  for(int i=0;i<10;i++)
    {
    digitalWrite(led[i],HIGH);
    delay(d);
    digitalWrite(led[i],LOW);
    }

  for(int j=0;j<8;j++)
    {
    digitalWrite(led[8-j],HIGH);
    delay(d);
    digitalWrite(led[8-j],LOW);
    }
}

/* Code ends here */

Hope, you had enjoyed this post. Thanks for reading this post.

Check out the video:


Stay tuned for more tutorials.




Arduino based DC Voltmeter (0-50 volts)

In this post, we are going to make digital voltmeter using arduino uno. It's a DC voltmeter and it's range is 0 to 50 volt. As we know, arduino is an open source hardware prototyping platform used worldwide by the hobbyists, educators and students across the globe.
This is a handy voltmeter.

Stuff required:

  1. Arduino uno
  2. 16*2 lcd
  3. 10k pot
  4. voltage source

Objective of the project: To make a digital voltmeter, which can measure voltage from 0 to 50 volt DC and thereafter it can display on 16*2 LCD.

Connections:

Make the connections as given in the figure below:

Arduino based voltmeter
Once the connection is made, upload the source code.

/* Source code */

const int volt=A0;

float val=0.0;

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.begin(16, 2);
  lcd.print("VOLTMETER");
}

void loop() {
  val=analogRead(volt);
  val=val*4.887;     // convert digital count into millivolt
  val=val/1000;      // convert millivolt into volts
  val=val*10.0;
  lcd.setCursor(0, 1);
  lcd.print(val);
}

/* End of source code */

Check out the video:



Hope you guys have enjoyed the post.

Thanks for reading the post.

3*3*3 LED cube using arduino uno

Hello Friends,

In this post, we are going to make 3d led cube using arduino. It's 3*3*3 led cube, so require a total of 27 leds. For driving 27 leds we require driver IC like ULN2003.


List of components:
  • Arduino uno
  • 27 LEDs
  • ULN2003
  • Perfboard
  • 8 220 ohms resistor
  • Jumper wires
Connections:

Schematics
In 3*3*3 led cube, basically there are three layers. In first layer, ground is common for 9 leds and same for layer 2 and layer 3.

There are 9+3 output pins, 9 for anode and three for 3 layers.


We are using ULN2003 IC, since arduino can't provide enough current to drive all the 27 led simultaneously.

Check out the video: