R-B | Embedded Lab

Author Archives: R-B

Arduino pill reminder

Posted on September 4, 2014 by R-B Leave a comment

This Arduino-based Pill Reminder is suitable for people who often forget to take their medicines on time. It has 14 pill compartments in total and each compartment contains pills for a day of week. An RTC chip is used for timekeeping, and LEDs are used to light up the appropriate compartment every day. In addition, a proximity sensor is also implemented to sense a person approaching the device, which in turn, makes the LED blink to attract the attention.

Pill reminder

Exploring HLK-RM04 Serial-to-WiFi Module

Posted on September 3, 2014 by R-B Leave a comment

HLK-RM04 is a low-cost UART-ETH-WIFI module developed by Shenzhen Hi-Link Electronic co., Ltd with built-in TCP / IP protocol stack. In this article, Ray shares his first experience experimenting with this module and explores its Serial-to-WiFi capability using Arduino.

HLK-RM04 Serial-to-WiFi Module

A Boy and His Atom: The World’s Smallest Stop-Motion Film

Posted on September 2, 2014 by R-B Leave a comment

A Boy and His Atom is the world’s smallest movie made of rendered still images of the individually arranged carbon atoms on a copper surface using a scanning tunneling microscope (STM). The movie was made by IBM researchers and made of 242 individual stop-motion frames, with each frame measuring approximately 50 atoms wide.

A Boy and His Atom: Movie made out of still images of atoms

Here’s the movie posted on Youtube.

Three tact switches, three LEDs, three I/O lines

Posted on August 29, 2014 by R-B Leave a comment

Francois AUGER & Philippe Fretaud has posted this Design Idea on EDN that shows how to drive three LEDs and scan three tact switches with only three I/O pins of microcontroller. They have demonstrated the technique using the Atmel microcontroller (Arduino), and the technique could be useful for any low pin count devices where you can run out of I/O resources easily.

3 switches and 3 LEDs to 3 I/O pins

Arduino quiz show buzzer

Posted on August 28, 2014 by R-B Leave a comment

This nicely-built quiz game buzzer system is Arduino-based and captures the fastest player or “first to respond” out of four players.

Quiz game controller

A good friend of mine who’s a teacher was doing quizzes in her class making students compete to answer questions… resulting in them complaining they raised their hands before the others. I decided to give her this quiz show type buzzer for Christmas to solve her problems.

When one of the players press it’s button (the fastest player wins this), the led of the right colour lights up saying he’s in control… and no other buttons from the other players work, until the master of the game decides if the answer is good or not by pressing a little button on the main unit, giving a point or not to the player in control.

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