All posts by admin

WiFi Scanner using PCD8544 and NodeMCU

While searching in my Pandora’s box of electronics, I came across the beautiful PCD8544, or the more familiar name, the Nokia 5110 LCD. This amazing piece of hardware is fully programmable using Arduino or ESP8266/NodeMCU. Thanks to Adafruit and bbx10 for their libraries which make our lives easier. The display has a resolution of 84×48 pixels. Each pixel can only be on or off, so there you have it, a… Read Article →

touch board electric paint

Touch Board and the famous Electric Paint

Touch Board Have you heard of an Arduino compatible device which supports Touch interface, distance sensing, MicroSD Card, Audio Jack, MP3 decoder, Micro USB, JST Connector and more. Well, we have! Let’s introduce our newest board, Touch Board which was brought to life by Bare Conductive. In this article we are going to review this product by mentioning specifications, use cases and what is particularly interesting about this product. Touch… Read Article →




esp8266 wifi

Extend WiFi with an ESP8266

The ESP8266 is known for it’s powerful features and performance despite its small size. However few knew it could act as a WiFi extender/repeater. From previous lessons, we learned how to make the ESP8266 act as both a station and an access point. Now we are going to use that functionality at the same time with a little twist. Unfortunately the standard firmware is not capable of forwarding packets between… Read Article →

piezo

Detect Vibrations using a piezo element

A rather simple, cheap, yet effective way to detect vibrations is by using a piezo element. The piezo element is an electrical component found in many commercial products to detect impacts, vibrations, pressures and also to produce sound. The piezoelectric effect (as it is known) was discovered in 1880 by French physicists Jacques and Pierre Curie. By definition the piezoelectric effect is the electric charge accumulated in certain solid materials… Read Article →

ds1307-module

Keep accurate time using Real Time Clock (RTC)

The Arduino board can keep time using millis() which increment from boot up till shutdown, then it will start over again. But what if we needed to keep time indefinitely, independently whether the board is switched on or off? What if we don’t want millis() but we want the year, month, day and time? How do we compensate for leap years? No worries. We are fortunate enough to have the… Read Article →




Arduino Beginner’s Course Lesson 7– Understanding Interrupts

You can download our e-book ‘Learn Arduino from Scratch’ from this link What are interrupts? Well they interrupt something for sure, precisely they interrupt the main program execution of the CPU. In Arduino we have 2 main functions the setup() and the loop(). Interrupts interrupt code execution in the loop(). But why should we care about interrupts anyway? They are not something to be feared, they make your code cleaner… Read Article →

evothings

Evothings – Part 1 Setup

You can download our e-book ‘Learn Arduino’ from this link The greatest thing that happened after the introduction of Arduino was the Evothings + Cordova framework. Evothings workbench is both a framework and a just in time debugger. It uses Cordova in its core, and its programming language is the notorious Javascript. Applications are written in HTML/CSS for their GUI and Javascript for their logic, yes just like a website…. Read Article →

hacker

Messing with WiFi protocol, Esp8266 and fake APs

You can download our e-book ‘Learn Arduino from Scratch’ from this link I was browsing the internet on a rainy day, and stumbled upon some cool stuff. The ESP8266, apart from being a super chip, which can be turned into a station and an access point, it can also do some weird stuff at the lowest possible level on the WiFi protocol. wifi_send_pkt_freedom() is a function built in Arduino Core… Read Article →