DMX or DMX512 is short for Digital MultipleX(the number 512 represents the max number of channels), a communication protocol mainly made for lighting controls. It was introduced in 1990’s and was developed by Engineering Commission of United States Institute for Theatre Technology (USITT). On that time, DMX512 is so expensive to design and implement. Only today with the advancement of technology, anyone can now develop their own DMX512 device.
One of my project: a led watch with 71 SMD LED. The microcontroller is a Microchips PIC16F728 running in 4MHz crystal oscillator and powered by CR2032 battery.
With the use of microcontrollers, designing a DMX512 controlled led lights is now easier. DMX512 stands for Digital Multiplex which was developed by Engineering Commission of United States Institute for Theatre Technology (USITT) way back in 1990’s. Way back in 90’s era, it takes hardwork to design a DMX controlled lights.
In the first lesson, we learned the keys of the piano. On this lesson we will now learn the basic chords on a piano. There are 12 basic chords(also known as “triads” because it is composed of 3 notes) in a piano. Chords in piano are the same as in guitar. All chords of guitar has its own corresponding chords in piano. So if you already know how to play guitar then it will be easier for you to understand and learn this lesson. Below are the basic Majorchords of a piano. Don’t be confused with the chords with “/”, for example A#/Bb means that A# and Bb are just the same. You can use A# in replacement to Bb and vice versa.
Note that there are notes that are the same; A# and Bb are the same, C# and Db are also the same, likewise D# and Eb, F# and Gb, and G# and Ab are also the same. This can be explained by understanding the meaning of sharp(#) and flat(b). Continue reading “Piano lesson 1 – familiarization of keys”