RC5 is a unique block cipher and it’s first designed by Ronald Rivest in 1994. The RC is a short acronym stands for “Rivest Cipher” or also known as “Ron’s Code!”

RC5 has a variable block size (32, 64 or 128 bits), key size (0 to 2040 bits) and number of rounds (0 to 255). One of the key features of RC5 is the use of data-dependent rotations. The main goal of RC5 was to prompt the study and evaluation of such operations as a cryptographic primitive. RC5 consists of a number of modular additions. The general structure of the algorithm is a Feistel-like network. The enrcytion and decryption routines can also be specified in a few lines of code.

By using this RC5 remote control, you can easily control your TV set. You own build remote control with only one button or even more than hundred buttons! The basic RC5 remote control only have 5 buttons, which as Stand-by, Program + and -, Volume + and -.

If you want more buttons, then you need to write your own routine that read the buttons when they’re connected in a matrix!

You have done most of the Arduino-based projects and you would like something more thrilling and exciting? Well, since you asked for it, then you got it!

Today, you’re going to develop an awesome Arduino Theremin and it’s based on the Parallax PING sonar sensor. Hold on a second, for those that didn’t know what “Theremin” is, the Theremin is one of the earliest electronic musical instruments and it’s the first musical instrument played without being touched!

Leon Theremin, a Russian inventor, invented Theremin in 1919. The controlling section usually consists of two metal antennas, where it senses the position of the player’s hands and control radio frequency oscillator for frequency with one hand and volume with the other. The electric signals from the Theremin are amplified and sent to a loudspeaker and it’s also an electrophone too!

To be honest, it’s not to hard to build this Arduino Theremin, but it’s kind hard to learn how to play with it! lol

However, as long as you have the dedication and determination to master the playing skill, you’ll be in love with this Arduino Theremin for sure…

Today, let’s talk about the SERB (Careful, it’s “SERB” not “SERP!”) or it also known as an Arduino Controlled Servo Robot. If you have deep interest on developing Arduino based robot, then this SERB is the ultimate choice for you!

For your information, this SERB is a great kit that includes everything that you want to begin experimenting with robots, all the Arduino microcontrollers, and open source hardware.

This SERB package is a fully programmable by simply using the optional Arduino Duemilanove microcontroller, which it’s an open source microcontroller and development environment. With the high quality laser cut acrylic chassis, solder-free, ready to run preloaded program, easily expandable and dual ball bearing rear wheel, it even made this SERB into a more sophisticated and fun to be developed with!

Since this is an open source design, thus you can build as many as you want. Beside that, you also can compete with your family/friends with SERBs and have some good moment together.

This innovative SERB will cost you $175 per set and it offers free shipping to the USA and Canada. After all, it can be an idea X’mas gift as well!

Are you felt it’s a troublesome to separate all the data acquisition, signal generation and so on into different tasks? Then, would you wish to have a super machine that can handle all those tasks and give you a relief?

If you do, it’s about time to check out this COMA tool. First of all, don’t misunderstood about the COMA word, as it’s an acronym for “Calculator Oscilloscope Multimeter Analyzer” or you can simply say that it’s a combination of four different components into one super cool tool!

Well, it might sound a little bit out of sense, but soon after you’ve tested its features, you’ll be amazed by its capable of performing multiple tasks in one tool.

Some of the main features of this COMA are:

• Two channels, 8 bit 16MSPS Oscilloscope
• FFT on acquired data
• Eight Channel Logic Analyzer
• Signal Generator
• Frequency Generator
• Multimeter
• Volmeter
• Ammeter
• Ohmeter
• L/C Meter
• Logic Probe
• Transistor Check
• Calculator

The great part about this COMA is it can be produced in a very low cost and the capabilities of the PIC32 are being maximized. In overall, this is the idea tool for all the home hobbyists!