A couple of weeks ago, I just post a review of my MCP23017 breakout board. As the board configuration allows to connect up to 8 of these boards, I decided to do it and see that it really works. My goal is interface 8 LCD displays with two wires: SDA and SCL from an I2C bus. […]
How to interface 8 LCD displays and 24 leds with only two wires Read More »
The heart rate, also referred to as pulse rate, has been recognized as a vital sign since the beginning of medicine, and it is directly related to a person’s cadiovascular health. Today, we are going to make a PC-based heart rate monitor system using an Arduino board and Easy Pulse V1.1 sensor. Easy Pulse is
PC-based heart rate monitor using Arduino and Easy Pulse sensor Read More »
The Singularity Vernor Vinge proposes an interesting — and potentially terrifying — prediction in his essay titled “The Coming Technological Singularity: How to Survive in the Post-Human Era.” He asserts that mankind will develop a superhuman intelligence before 2030. The essay specifies four ways in which this could happen: Scientists could develop advancements in artificial
What's the technological singularity? Read More »
RFID reader / writer SL500F gladly communicates with any 13,56MHz RFID card. For a concrete application we usually need only one type of an RFID communication. For the sophisticated devices or for devices intended for configuration of various RFID cards, a reader handling all common protocols can be very convenient. SL500F, a novelty in our
SL500F – a „full-featured“ RFID device Read More »
5: Bluetooth Car Stereos Just because a vehicle didn’t come straight from the dealer ready to connect to Bluetooth doesn’t need to deter you from upgrading. There are stereos on the market that can have you hooked up and ready to go in no time. These devices help sync everything together and provide you with
5 Bluetooth Car Accessories Read More »
I develop this MCP23017 Brekout Board to interface a 2×16 LCD display with any microcontroller using a standard I2C bus. Typical 2×16 displays needs at least 6 lines to work (when working in 4-byte mode); in some cases, this will be prohibited for some microcontrollers. With this board, you can control it with only two lines
Designing Electronics in Spain Read More »
In most of the world, camcorders, or video camera-recorders, have been a familiar sight for nearly 20 years. People take them everywhere: to school plays, sports events, family reunions and even births! When you go to a popular tourist spot, you are surrounded by them. Camcorders have really taken hold in the United States, Japan
How Camcorders Work Read More »
Write messages and show animations on this palm-sized heart-shaped LED display. Works seamlessly with Arduino, and requires only three pins to control. Want a heart matrix of your very own? You can buy this DIY kit for $17.95 on the product page. How does it work? Three shift registers control two LED matrices, each with
Two LED matrices give 70 LEDs to light up a necklace with Read More »
Hard Drive Backup Solutions To make backing up your hard drive as easy as possible, you should set up a backup profile. Most PCs with Microsoft Windows XP have a program called Windows XP Back Up installed as a useful application. Once you open the application, you can follow the instructions from the backup wizard
How to Back Up a Hard Drive Read More »
With the proliferation of high-brightness LEDs designed to provide replacement lamps for commercial and domestic lighting there comes an equal, if not greater, proliferation of power supply solutions. With hundreds of products from dozens of manufacturers, it becomes a question of how to make sense of all the permutations of input / output voltages and
How to Choose the Right Power Supply for Your LED Lighting Project Read More »
