Author: WK

Getting started with the Pi 2

There are various things that needs to be done before we can start using the Raspberry Pi 2, which includes flashing the Raspbian OS into the MicroSD card (which is the brain of the Raspberry Pi!).

Mini BT Ultrasonic Rangefinder

During the weekend, I wanted to create a simple Arduino project that would not take more than 30 minutes, so I have decided to come up with this portable Bluetooth-based ultrasonic range finder. Using Bluetooth to transmit the value to...

Under the USB Microscope

Having modified a webcam into a USB microscope, I got a glimpse into the remarkable microscopic world. (Though the images isnt’ that great) These pictures were taken in October 2014, but I decided to upload them here as they were rather interesting.

Scrolling text with flexible 32×8 RGB LED Matrix

Needed a way to display scrolling text or messages? This Flexible 32×8 RGB LED Matrix display may suit your needs! With 256 LEDs on it, you can display text, patterns or even animation if you want to. Therefore, in this tutorial,...

Decrypting whatsapp database (Root required!)

Ever wanted to have a local copy of all your whatsapp conversation but you are unsure how to get about? In this tutorial, I’ll be showing you how to get a decrypted whatsapp database onto your computer. This tutorial is meant...

Changing sound output using code

Sound (by default) is usually outputted via the HDMI cable if your display have speakers, but what if your display does not have speakers & you want to change sound output to the audio jack instead? There is a chance...

Verification using Fingerprint Sensor

Recently, I bought a fingerprint sensor to use in my project and is useful as an alternative method for identity verification. For example, it could be used for opening doors, lock, safes and many more. Since I’m at it, I thought, “Why not...


We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard. – John F. Kennedy,  Address at Rice University, September 12 1962

Happy Pi Day!

  It’s Pi Day today, the celebration date of the number that is the ratio of a circle’s circumference to its diameter. It is held annually on 14 March, because 03/14 spells out the first three digits of π, or pi,...

Darwin Mini demo

A short demonstration of the Darwin Mini Robot.