April 2016 - Khmer Maker - Electronic and Design

Saturday, April 30, 2016

Photoresistor

How it works
This sensor can be called light-dependent resistor, LDR, or photocell is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity.

Circuit:

Reflective Optical Sensor TCTR5000

Electronic Component

How it works
This sensor is reflective with infrared light and it contained emitter and phototransistor in a leaded package. This sensor will send the signal HIGH(1024) when it sees light color or reflection and it will produce down to LOW(0) when it sees darkest. So we can use that range for many different tasks depending on the project.

Circuit:

This sensor has for legs which we have to be careful when we attach it. The image below will help you to see and understand which leg should be working the right way. Please see the image below:

IR Receiver Modules TSOP382, TSOP384

Electronic Component

This sensor is used to receive the signal from remote control using infrared red.
It will help you to communicate between the Arduino and your electronic components remotely with any remote control.

Specifications:

This sensor has three legs and they are doing differences job

1 = Output signal which used to send the signal that it gets from remote control to the Arduino

2 = Is ground

3 = Input voltage which range from 2.5v - 5.5v

Ultrasonic Ranging Module HC - SR04

Electronic Component

This sensor is used to determine the non-contract distance between 2cm-400cm function.
We can use it tell the distance and to do something in that distance as well.

Specifications:
This sensor has four legs such as
- VCC = input voltage range from 2v to 5.5v
- TRIG = Trigger it used to send the sound out
- ECHO = it used to calculate the waiting time when the sound from trigger is returning back
- GND = is ground

Arduino Chapter 1 - LED Blinks

Arduino Tutorials

This sample is the very basic sample and a basic start for beginner.
Working with led and Arduino to control the way it turns ON(HIGH), OFF(LOW) and Blink.

Requirement
- Genuino/Arduino Board
- 1 LED 3v
- 220Ω resister

Circuit:

Code:
void setup() {
// usedigital pin 13 as an output.
pinMode(13, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(2500); // wait for a second

digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(2500); // wait for a second
}

Arduino Chapter 1 - Read Analog from Serial device

Arduino Tutorials

This example will show you how does a serial device send signal to Arduino and how Arduino will track those signal then show it on the screen through Serial Monitor of Arduino IDE.

Requirements:

- Arduino or Genuino Board

- TCTR 5000 Sensor

Circuit:

Read more about Reflective Optical Sensor TCTR5000

Code:

void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
// read the input on analog pin A0:
int sensorValue = analogRead(A0);
// print out the value you read:
Serial.println(sensorValue);
delay(1); // delay in between reads for stability
}

Arduino Chapter 1 - language structure - setup() and loop()

Arduino Tutorials

In Arduino they use their programming language which is using OOP but they have customize some keywords or namespaces.

Today I am going to show you about the base structure of Arduino such as Setup() and Loop()

setup()This function is called when a sketch starts. Use it to initialize variables, pin modes, start using libraries, etc. The setup function will only run once, after each powerup or reset of the Arduino board.

Example
int btnPin = 3;
void setup()
{
Serial.begin(9600);
pinMode(btnPin, INPUT);
}

void loop()
{
// ...
}

Note
Serial.begin() //used to tell the processing speed be tween Arduino and computer
pinMode(pin,status) //used to assign status to a pin

loop()This function is used to loop the action repeatedly again and again.

Example
void loop()
{
if (digitalRead(buttonPin) == HIGH)
Serial.write('HIGH');
else
Serial.write('LOW');

delay(1000);
}

Note
digitalRead() //used to read digital signal from a pin
Serial.write() //used to show the information back to the computer through Arduino

Friday, April 29, 2016

Vongchann Electronic Arduino with OLED Display Screen

Test Project

Wooo. OLED.
Do you know what is OLED stand for? it stands for Organic Light Emitting Diots. Today I am gonna show you how this thing will work with Arduino and You will also see that what can OLED do or show on its screen.

I am using 128x64 pixels OLED so it is quite small but it works well.
Before you can start working with this OLED and Arduino the main thing you have to know is the serial and ID of it as the OLED that I am using is U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);

This article just want to show you about how I test it, if you want to see more about the tutorial of the process and how you can work with it step by step, then just calm down and follow or subscribe my channel.

Now. let's see my video about using Arduino with OLED Display Screen

Vongchann Electronic - Arduino with HC SR04 Sensor test

Test Project

Today I have another sensor called HC SR04. This sensor used to tell the distance between object that is right in front of it. This sensor has two special parts that we should never forget such as:

Trigger: is the part which send out the sound to hit any object in front of it
Echo: is the part which wait for the sound to come back and calculate the waiting time

According to these two parts this sensor can help use to find the distance between object that is in front of it.

In fact, Want to see how it works? Watch the video below then you will see it.

Vongchann Electronic - Arduino And Remote Control Test

Test Project

Now it is time for you guys to see my experiment with Arduino and other electronic component and now I choose IR Receiver to make a remote control with LEDs.

When I press the button on the remote control it will tell the LED which I assigned to turn on then I press another button it do the same way and I can also turn them off with the remote control as well. The interesting thing about this experiment is I will change various of remote control so you can see that we can use Arduino to manage and control those components.

Check my video below you will see how it works.

Vongchann Electronic - Electronic Circuit

Electronic Theory

After we have known and understand how Ohm Law works; now I would like to bring you guys back to see about electronic circuit which we have already learned at high school.
In this article I just want you guys to see the differences between two electronic circuit such as Serial and Parallel.

Serial: The circuit will focus on the voltage of each electronic component and they will continue adding the voltage of all the components to the circuit.
Parallel: The circuit will focus on the current that flow a long; it doesn't care about huge voltage but it cares about the current that it would be able to handle the electronic components.

See my video you will see and understand more about these two types to circuit:

Vongchann Electronic - Ohm Law

Electronic Theory

I want to have a bit of review about Ohm Law before we jump in to the lesson about electronic, it is really useful in physic theory that Ohm Law is used to describe about the potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the "resistance", R.Ohm's Law is given by:

V = I R where V is the potential difference between two points which include a resistance R.

As this is the matter for all learners I would like you guys to see my video about Ohm Law as shown below:

Arduino Board Introduction about each pins, ports and its functionality

Electronic Theory

I will show you more about the Arduino or Genuino Board. This lesson will help you to understand how each pins work and see how it looks.

Here is the technical specifications about the Arduino UNO board will have