Showing posts with label b. Show all posts
Showing posts with label b. Show all posts

Wednesday, June 12, 2013

Butterfly Flying Lights Johnny B Butterfly



American artist Graham Owen has created a chandelier called Johnny B. Butterfly, because of novel decoration concepts and sophisticated craft technology, the life of incandescent light bulbs are very pleasantly surprised once again. The exterior design of of Johnny B. Butterfly derived from the existing design of Johnny Be Good series, though it simply set in an ordinary light bulb is often seen above by a white translucent ring is made of Teflon material, but This simple design has made the light bulb is no longer used to bring home the feeling of glare, but also exudes a natural light effect. (I think it should be used as bright night lights.)



Based on the Johnny Be Good series, this Johnny B. Butterfly plus butterflies and dragonflies are hand-made by the Graham Owen of and other insects as an embellishment on the outer ring attached of Teflon, for Johnny B. Butterflys appearance brought more rich colors of the remaining United States, but also simple and direct lighting back to the most natural feeling.

It is so beautiful, but could the LED light bulbs replace this one?


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Friday, April 12, 2013

60W POWER AMPLIFIER CLASS B CIRCUIT DIAGRAM

60W POWER AMPLIFIER CLASS B CIRCUIT DIAGRAM

Capacitor C1 regulates the low frequencies (bass), as the capacitance grows, the low frequencies are getting louder. Capacitor C2 regulates the higher frequencies (treble), as the capacitance grows, the higher frequencies are getting quieter.

This is a class B amplifier, this means, that a current must flow through the end transistors, even if there is no signal on the input. This current can be regulated with the 500 Ohm trimmer resistor. As this current increases, the sound of the amplifier is better, but output transistors are dispatching more heat. If the current is decreased, the transistors are dispatching less heat, but the sound quality is decreased.
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