Category Archives: Electronics ‘How-Tos’

Powering the LEGO Mindstorms Brick from a 9v Plugpack

I have been asked a number of times too how I power my Stationary and Development Robots from a 9 Volt, 5 Amp D.C. Plugpack connected to the Mains Power Supply. I prefer to have a Power Supply that can easily handle the demands put on it. A minimum rating of 3 Amps is needed if you plan running 4x Motors from the EV3 Brick.

Using WS2812B Addressable RGB LED Strips with Arduinos

WS2812B LED Strip
This article is about my experiments with the WS2812B LED strip, which is an addressable RGB LED strip. This information should also work with other similar LED strips, such as strips of the WS28XX family, Neopixel strip, among others. The WS2812B addressable LED strip comes in several varieties that differ in size, sealant or LED density. Choose the one that best fits your purpose.

Using a 0.96 inch OLED Display with Arduino Microcontroller

0.96" OLED Display
In this article I will show how to use the small 0.96 inch OLED display with an Arduino Microcontoller board to build a very basic Weather Station.

Introduction to using the BMP180 barometric sensor with Arduino

bmp180 barometricsensor
The BMP180 barometric sensor (model GY-68) in the following two images is a very small module with 10mm x 10.1mm (0.039in x 0.043in) footprint. This guide is also applicable for other similar barometric sensors.

Using the HC-SR04 Ultrasonic Sensor with Arduino

The working principle of an ultrasonic sensor is simple and use high-frequency sound waves that are evaluated when the sensor received back the waves. To determine the distance between the robot and object, the sensor measure the elapsed time between sending and receiving the waves.

Using a Membrane Keypad with an Arduino

Membrane Keypad
With this tutorial, you will be learn to access any keypad, and have it interact with a microcontroller. You can salvage these keypads from old telephones or you can purchase them from most electronics store for less than $2. They come in wide variety of shapes and sizes. The most commons sizes are 3×4 and 4×4, and you can get keypads with with words, letters and numbers written on the keys.

Secure Access using MFRC522 RFID Reader with Arduino

This Article shows a simple example on how to use the MFRC522 RFID reader, with a quick overview of the specifications, and a demonstration project using an Arduino.

How to Install the ESP8266 Board into the Arduino IDE

There are a variety of development environments that can be used to program the ESP8266. The ESP8266 community created an add-on for the Arduino IDE that allows you to program the ESP8266 using the Arduino IDE and its programming language.

Using RF 433MHz Transmitter/Receiver Module With Arduino

This Article aims to be a comprehensive guide to the popular RF 433MHz Transmitter/Receiver modules. Information on how they work, some features, and an Arduino project example that you can take and apply to other projects.

Streaming FLAC Audio to MP3 Enabled Devices

I purchased myself a Sony CMT-MX750Ni Mini Hi-Fi System. It is a fantastic home audio device that plays from the following media: CD, USB, Audio In, iPod/iPhone, FM Tuner, DAB Tuner, Home Network (Windows Media Streaming), Internet Music Services via wireless and wired connection. The Sony CMT-MX750Ni is easy to use and allows access to all of your audio content, wherever it is located (with the exception of vinyl and tape). It is easy to set up and produces very good quality sound.

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