LTSpice - Voltage Controlled Switch

For anyone that is having trouble understanding how to implement a Switch on a circuit, using LTspice. Here is a good video showing how you can proceed.

Some Facts About Beethoven

In 1802, Beethoven was going deaf. Increasingly upset about his condition, he wrote a letter (known today as the Heiligenstadt Testament) to his brothers Johann and Carl. The letter was found in Beethoven’s desk, after his death. It had never been sent. When he died in 1827, the great composer was 56 years old. He had been totally deaf since age 50. During much of his adult life he had been plagued with extreme abdominal pain and related ailments. Although he sought help from numerous physicians, he had no relief. Despite his physical difficulties and his complete inability to hear, Beethoven composed the 9th Symphony (which is still used to celebrate major events such as the fall of the Berlin wall.) Named for the village on the Danube where it was written, the Heiligenstadt Testament provides a rare glimpse into Beethoven’s psyche. He begs his brothers to find out, after his death, what caused all his physical maladies. Nearly 200 years after he asked the question, we finally have the answer. And it comes from an unlikely source: Beethoven’s own hair. Many people snipped locks of Beethoven’s famous hair immediately after his death. One of those locks, cut by a teenager, miraculously survived to this day. Ferdinand Hiller, then a 15-year-old musician, took a piece of Beethoven as a memento of the brilliant but irascible composer. Hiller, who became a composer and conductor himself, placed his treasure into a locket and later gave it to his son Paul. The younger Hiller identified the object. The story of its travels, from Vienna to the United States, is a fascinating one. Likely, during the Holocaust, the locket bought safe passage for a Jewish family. In 1994, Sotheby’s auctioned the locket containing hundreds of strands of Beethoven’s hair. It was purchased for $7,300 by Americans who wanted to establish a Beethoven Center at San Jose State University. Eight strands of hair were submitted for careful study and DNA analysis. After several years of work, scientists discovered a startling fact: Beethoven’s hair contained huge quantities of lead - about 100 times the average. With little question, Beethoven had lead poisoning. That condition, also known as “plumbism,” certainly would have caused his constant abdominal pain and depression. It may well have contributed to his death. But the question now is: Did it cause Beethoven’s deafness? At this stage of study and analysis, the answer seems to be “no.” Perhaps, however, there is more to learn from Beethoven’s hair.

Alexey Arkhipovskiy on the Balalaika

Tired of Waiting in Line? Here is the solution?

https://www.facebook.com/idoprototype/posts/420984531328924

Horn Lovers

Some Portugues Musicians, playing a great instrument and very well. Soon are realising a new CD!!

Estudo e Análise da Estabilidade Transitória

Hoje decidi disponibilizar aqui um pdf para download (no link que se segue) sobre o Estudo e Análise da Estabilidade Transitória em SEE. Tudo isto porque esta Professor Doutro Carlos Ferreira, docente do ISEC. http://www.crocko.com/1F68139B31B44DAABA914A8DBBDB5CC7/ASE_2012-2013_-_Estudo_e_Analise_da_Estabilidade_Transitoria_em_SEE.pdf

Azeitonas & Clarinetes Ad Libitum

Banda Formada no Porto, em 2002, é uma das bandas nacionais mais solicitadas ao vivo. Parece que o seu novo trabalho desta vez tem a presença de "mais" instrumentos do que é habitual. Dai este vídeo, mostrando o grupo de clarinetes Ad Libitum a gravar com os Azeitonas. Os Clarinetes Ad Libitum são um dos mais entuasiasmantes ensembles de fusão do clarinete com paisagens sonoras de diversas raízes, com particular destaque para a influência portuguesa. Nuno Pinto, José Ricardo Freitas, Luis Filipe Santos e Tiago Abrantes são as “estrelas” do clarinete às quais se junta ainda João Tiago Dias na percussão.