Friday, October 26, 2007

Submarine volcanoes

Submarine volcanoes are general features on the ocean floor. Some are energetic and, in shallow water, disclose their presence by blasting steam and rocky fragments high above the surface of the sea. Many others lie at such great rock bottom that the tremendous weight of the water above them prevents the explosive discharge of steam and gases, although they can be detected by hydrophones and staining of water because of volcanic gases. Even large submarine eruptions may not disturb the ocean surface. Because of the rapid cooling effect of water as compared to air, and increased buoyancy, submarine volcanoes often form rather sharp pillars over their volcanic vents as compared to above-surface volcanos. In due time, they may break the ocean surface as new islands. Pillow lava is a common eruptive product of submarine volcanoes.

Monday, October 15, 2007

Electronics

Electronics is the learn of the flow of charge through different materials and devices such as, semiconductors, resistors, inductors, capacitors, nano-structures, and vacuum tubes. All applications of electronics involve the transmission of either information or power. Although measured to be a theoretical branch of physics, the design and structure of electronic circuits to solve practical problems is an e Most analog electronic appliances, such as radio receivers, are constructed from combinations of a few types of basic circuits. Analog circuits use a continuous range of voltage as contrasting to discrete level as in digital circuits. The number of different analog circuits so far devised is huge, especially because a circuit can be defined as anything from a single component, to systems containing thousands of mechanism.

Tuesday, October 09, 2007

SYNC

The SYNC standard, repeatedly called DIN sync, defines an interface for electronic music instrument. It was introduced in the 1980s by Roland firm for synchronization of music sequencers, drum machines, arpeggiators and similar devices. The SYNC standard uses the signal device and start/stop. This means the low position is 0 V, the high position is about +5 V. The clock signal defines the speed of the progression or drum pattern.
The start/stop signal defines if the sequence is successively ie;start/stop = 0 V -> stop, start/stop = +5 V -> running.The SYNC standard uses 5 pin DIN connectors, the same as used for MIDI, but uses a special pin-out. The term DIN sync does not mean that it is a DIN normal, only that it uses DIN connectors. In some applications the outstanding pins (4 and 5) are even used as tap, fill in or reset and start. But this differs from machine to device.To connect two SYNC devices a cable with a 3 or 5 pin plug up on each side has to be used. A standard MIDI cable is not fitting as here the pins 1 and 3 may be unconnected.