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Monthly Archives: September 2018

Halloween Project with Skull, Arduino, Blinking LEDs and Scrolling Eyes | Maker, MakerED, MakerSpaces

Halloween Project with Skull, Arduino, Blinking LEDs and Scrolling Eyes | Maker, MakerED, MakerSpaces

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Halloween Skull

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Halloween Project with Skull, Arduino, Blinking LEDs and Scrolling Eyes

Soon is Halloween, so let us create a scary project while coding and DIY (tinkering a bit…). The tutorial is made for people who don’t have a 3D-Printer, we will use a 21 cm plastic Skull for 13€ bought on Amazon, 3 ARDUINO NANO’s and two 8 mm WHITE LEDs to realize this project. First let us have a look how the project will look to give you the right motivation to start it, check the video below, please:

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As you might have realized while watching the video, there are 3 different effects in it:

In the above mentioned tutorials, you will find the wiring as well as the codes (Sketches):

First start with one of the 3 projects, make the wiring and upload the code to the ARDUINO Nano and test it. IF it is working start the second one and so on… Once finished the above mentioned we will need to integrate the hardware into the Skull…

Check below, please, the different steps…

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21 cm plastic Skull front view

21 cm plastic Skull front view

Click image, please, to enlarge

21 cm plastic Skull side view

21 cm plastic Skull side view

Click image, please, to enlarge

Cut the Skull

Cut the Skull

Click image, please, to enlarge

 

WS2812B soldering

WS2812B soldering

Click image, please, to enlarge

AMAZON.DE:

https://amzn.to/2NvdB3U

WS2812B soldering and heatshrinking tube

WS2812B soldering and heatshrinking tube

Click image, please, to enlarge.

AMAZON.DE:

https://amzn.to/2NvdB3U

WS2812B soldering and heatshrinking tube fixed in the Skull

WS2812B soldering and heatshrinking tube fixed in the Skull

Click image, please, to enlarge.

 

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Fixing EMO Display with hot glueFixing EMO Display

Click image, please, to enlarge.

AMAZON.COM:

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Fixing EMO Display with hot glue

Fixing EMO Display with hot glue

Click image, please, to enlarge.

AMAZON.COM:

https://amzn.to/2zoLyup

5x ARDUINO NANO

5xARDUINO NANO

Click image, please, to enlarge.

AMAZON.DE:

https://amzn.to/2NyO5uH

Cabling of the ARDUINO Nano’s

Cabling

Click image, please, to enlarge.

 

 

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SO, we have seen now ALL the necessary steps to make this project working, up to YOU now to bring in the electronics into the Skull and seal the Skull later with hot glue. You can use the above showing cable solution or to try to put everything on a Strip-Board and solder it; YOUR choice! 😉

Idea: You could try to include as well a proximity sensor which enables the playing of the devil laughter in the video 😉

How? Check below please:

Some devil laughter sounds:

 

Stay tuned for next blog post(s) 😉

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GUST-AVRIL2014-800px-2L’auteur Gust MEES est Formateur andragogique / pédagogique TIC, membre du “Comité Conseil” de “Luxembourg Safer Internet” (LuSI), appelé maintenant BEESECURE, partenaire officiel (consultant) du Ministère de l’éducation au Luxembourg du projet  ”MySecureIT“, partenaire officiel du Ministère du Commerce au Luxembourg du projet ”CASES” (Cyberworld Awareness and Security Enhancement Structure). L’auteur était aussi gagnant d’un concours en électronique en 1979 ( Pays germaniques ) et voyait son projet publié dans le magazine électronique “ELO”.


The author Gust MEES is ICT Course Instructor, ”Member of the Advisory Board” from “Luxembourg Safer Internet” (LuSI), BEESECURE, Official Partner (Consultant) from the Ministry of Education in Luxembourg, project “MySecureIT“, Official Partner from the Ministry of Commerce in Luxembourg, project “CASES” (Cyberworld Awareness and Security Enhancement Structure).

The author was also a winner of an electronics contest (Germanic countries) in 1979 and got his project published in the “Electronics Magazine ELO”.

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Keywords necessary for me to create this blog post: Arduino UNO R3, Arduino NANO, UNO R3 Project, Halloween, scary, EMO LED Matrix, devil laugh, WM2812B RGB LEDs, 8 mm WHITE LEDS, Plastic Skull, Heatshrinking-Tube, coding, learning to learn, learning by doing,

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First Steps with the Arduino-UNO R3 and NANO | Maker, MakerED, Coding | I2C LCD Temp./Humidity displaying

First Steps with the Arduino-UNO R3 and NANO | Maker, MakerED, Coding | I2C LCD Temp./Humidity displaying

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LCD1602 and LCD2004

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Displaying Temperature/Humidity on a I2C LCD 

We were already playing around, as seen on my tutorials below, with the Temperature/Humidity sensors DHT11, DHT22 and LCD1602, without I2C possibility. There were a lot of cables to connect, we will try out this time to use a LCD with I2C bus connection as it uses ONLY 4 wires to connect. It’s a perfect project for newbies in coding as they will see the measured values directly on the LCD screen, the success and happy factor is guaranteed!

Related tutorials:

 

Let us have first a look on the wiring (cabling) which is actually very easy, have a look below please:

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Fritzing-Wiring

====> Click image, please, to enlarge.

The wiring (cabling) will take about +/- 5-10 minutes depending on your own rhythm… Let us have a look on the coding now: we will use exactly the same code (Sketch) as in our first tutorial here, which we will change just a bit to fit for I2C LCD1602 display:

Copy&Paste the code from above tutorial where it is marked “I also made an example where I display the results on a LCD. Here’s the source code of that example:” and paste it into the Arduino IDE. Connect the Arduino NANO with your computer now. Open the Arduino IDE and choose the board “Arduino NANO”, see screenshot below, please:

Arduino-IDE-Board Manager-1

Click image, please, to enlarge.

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Next step, on the same Arduino IDE select the Processor:

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Arduino-IDE-Board Manager-OLD-NEW-BOOTLOADER

Click image, please, to enlarge.

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TIP: when the LED on the Arduino NANO is lightning GREEN it is an original NANO and you must choose “Atmega328P”; if the LED is lightning RED, it is a clone and you must choose “Atmega328P (Old Bootloader)”.

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NOW it is about time to adapt the code (Sketch) to an I2C-LCD1602 display, let us have a look on the Sketch (the original):

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OLD Code to change

Click image, please, to enlarge.

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As we can see in line 10: the library is meant for a normal LCD display, it needs to get changed for a “I2C LCD Library”.

In line 15: the same it shows the wiring pins for a normal LCD display, it needs to get changed for a “I2C LCD” display.

In line19: It is BETTER to add as well the I2C-Address, mostly “0x27” OR “0x3F”.

That is NOT much to change, we will see in the screenshot below the How-To:

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NEW Code to change

Click image please, to enlarge.

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By enlarging (click on the image) you will see by comparing where the changes are. I commented in the lines the WHY… Try it out to change it yourselves or just download the Sketch (Code) here below who is working:

Copy&Paste this code into a NEW Sketch on the Arduino IDE and upload now the code to the Arduino NANO (or Arduino UNO) and enjoy it! 😉 Here below a photo of the working sketch:

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DHT11 on LCD I2C Display

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And in case of that you have a I2C LCD with 20×4 configuration it works also, check photo below please:

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I2C LCD2004 and DHT11

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As you can see the two first lines from 4 possible lines are only used, that is normal as the Sketch (Code) is actually written for a 2 line LCD. BUT we can add some lines of code in the original Sketch to make it working on 4 lines, which is very easy actually, check below please for explication:

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Printing text on the LCD

Click image, please, to enlarge.

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As you can see in line 30 in above screenshot of the code ===> “lcd.setCursor(0,0); // Sets the location at which subsequent text written to the LCD will be displayed” the the line is set to “0” which means the first line on the LCD1602. By changing the value to “lcd.setCursor(0,1)” in line 30 and in line 34 to “”lcd.setCursor(0,2)” the text will be displayed as follows, see photo below please:

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I2C LCD2004 DHT11

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NOW, as you can see, we have two lines without any text where we could bring in some text. Let us try to find out HOW! We have seen already that “lcd.setCursor(0,0) above. We used in above example the lines 2 and 3 from 4 lines which were displayed as shown in above photo, right?

 

Printing text on the LCD in 4 lines

Click image, please, to enlarge.

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Check lines 26 and 27 and also lines 37 and 38: I added them, do the same and the text between the “………” you may change it with your OWN text what will result in following, check photo below, please:

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I2C LCD2004 4 lines of text

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BUT wait, my text looks centralized and yours NOT, HOW?! Check photo below, please which explains:

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4 Lines centered on I2C LCD

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Prices and where to order

 

LCD1602 + I2C Modul

LCD1602-I2C

Click image, please, to enlarge.

Arduino NANO

ARDUINO NANO

Click image, please, to enlarge.

 

LCD2004-I2C

Click image, please, to enlarge.

 

 Temperature/Humidity Sensors

DHT11

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Stay tuned for next blog post(s) 😉

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GUST-AVRIL2014-800px-2L’auteur Gust MEES est Formateur andragogique / pédagogique TIC, membre du “Comité Conseil” de “Luxembourg Safer Internet” (LuSI), appelé maintenant BEESECURE, partenaire officiel (consultant) du Ministère de l’éducation au Luxembourg du projet  ”MySecureIT“, partenaire officiel du Ministère du Commerce au Luxembourg du projet ”CASES” (Cyberworld Awareness and Security Enhancement Structure). L’auteur était aussi gagnant d’un concours en électronique en 1979 ( Pays germaniques ) et voyait son projet publié dans le magazine électronique “ELO”.


The author Gust MEES is ICT Course Instructor, ”Member of the Advisory Board” from “Luxembourg Safer Internet” (LuSI), BEESECURE, Official Partner (Consultant) from the Ministry of Education in Luxembourg, project “MySecureIT“, Official Partner from the Ministry of Commerce in Luxembourg, project “CASES” (Cyberworld Awareness and Security Enhancement Structure).

The author was also a winner of an electronics contest (Germanic countries) in 1979 and got his project published in the “Electronics Magazine ELO”.

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Keywords necessary for me to create this blog post: Arduino UNO R3, Arduino NANO, UNO R3 Project, LCD 1602, Sensors, DHT11,  DHT22, Temperature/Humidity Sensor, coding, learning to learn, learning by doing, trouble shooting, hygrometer, I2C, LCD 20×4,

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First Steps with the NodeMCU ESP8266 | Maker, MakerED, Coding | Text on I2C-LCD1602 Display written over Web-Page

First Steps with the NodeMCU ESP8266 | Maker, MakerED, Coding | Text on I2C-LCD1602 Display written over Web-Page

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I2C-LCD WEB-TEXT on NodeMCU ESP8266

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Text on I2C-LCD1602 Display written over Web-Page

Sometimes it might be useful to write a text which should be displayed on a LCD display without any cabling, that is possible to do over your own Wi-Fi network and a NodeMCU ESP8266 module. And the project uses ONLY 4 wires as the LCD1602 gets addressed over the I2C bus. Let us remember WHAT the I2C bus is in our previous tutorial:

Check out the wiring below please, ONLY 4 wires plus 2 for the power supply connections:

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Let us have a look on the video below who shows how it works:

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SO, knowing now how it works, let us have a look on the Sketch (Code). I changed a bit the code, as I am using an I2C LCD1602 and I added as well some more text displayed on the LCD1602 display. Check below, please, the original code. I will explain WHAT could (should) GET changed later with a screenshot of the changes and/or a download…

The Arduino code and the library for this project can be found at the links below. The library has to be saved in the Arduino libraries folder of the same name:

 

Find below, please, my changed code (Sketch) for downloading:

The download is a text file created with OpenOffice, copy the content and place it into a new Sketch on the Arduino IDE. ALL you have to do now is to change some lines, e.g.:

  • in line 47: Enter your SSID
  • in line 48 Enter your Wi-Fi Network Password

See PIC below, please:

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CODE-CHANGE

Click image, please, to enlarge.

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This should work for you now; in case of that you wouldn’t see the display working find here the trouble-shooting:

Mostly it is that your LCD1602 uses a different I2C-Address and/or that the ESP8266 isn’t allowed in your network for security reasons, to make sure check my blog post here, please:

Here below a working Sketch which shows how it is working: for security reasons you won’t see my SSID, nor my real IP-Address! 😉

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GUST-AVRIL2014-800px-2L’auteur Gust MEES est Formateur andragogique / pédagogique TIC, membre du “Comité Conseil” de “Luxembourg Safer Internet” (LuSI), appelé maintenant BEESECURE, partenaire officiel (consultant) du Ministère de l’éducation au Luxembourg du projet  ”MySecureIT“, partenaire officiel du Ministère du Commerce au Luxembourg du projet ”CASES” (Cyberworld Awareness and Security Enhancement Structure). L’auteur était aussi gagnant d’un concours en électronique en 1979 ( Pays germaniques ) et voyait son projet publié dans le magazine électronique “ELO”.

 


The author Gust MEES is ICT Course Instructor, ”Member of the Advisory Board” from “Luxembourg Safer Internet” (LuSI), BEESECURE, Official Partner (Consultant) from the Ministry of Education in Luxembourg, project “MySecureIT“, Official Partner from the Ministry of Commerce in Luxembourg, project “CASES” (Cyberworld Awareness and Security Enhancement Structure).

The author was also a winner of an electronics contest (Germanic countries) in 1979 and got his project published in the “Electronics Magazine ELO”.

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Stay tuned for next blog post(s) 😉..
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Keywords necessary for me to create this blog post: NodeMCU, ESP8266, Web Server, I2C, LCD1602, Coding, Maker, MakerED, MakerSpaces…

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