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Posted by Ababeel on April 01, 2015

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THE 555 AS A RAMP GENERATOR
When a capacitor is charged via a constant current, the waveform across it is a ramp.

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What is a breadboard?

W hat is a b readboard? A breadboard is used to build and test circuits quickly before finalizing any circuit design. The breadboard has many holes into which circuit components like ICs and resistors can be inserted. A typical breadboard is shown below: The bread board has strips of metal which run underneath the board and connect the holes on the top of the board. The metal strips are laid out as shown below. Note that the top and bottom rows of holes are connected horizontally while the remaining holes are connected vertically. To use the bread board, the legs of components are placed in the holes. Each set of holes connected by a metal strip underneath forms a node. A node is a point in a circuit where two c...

Who invented the transistor?

Who invented the transistor? Transistors were invented at Bell Laboratories in New Jersey in 1947 by three brilliant US physicists: John Bardeen (1908–1991), Walter Brattain (1902–1987), and William Shockley (1910–1989). The team, led by Shockley, had been trying to develop a new kind of amplifier for the US telephone system—but what they actually invented turned out to have much more widespread applications. Bardeen and Brattain made the first practical transistor (known as a point-contact transistor) on Tuesday, December 16, 1947. Although Shockley had played a large part in the project, he was furious and agitated at being left out. Shortly afterward, during a stay in a hotel at a physics conference, he single-handedly figured out the theory of the junction transistor—a much better device than the point-contact transistor. While Bardeen quit Bell Labs to become an academic (he went on to enjoy even more success studying super...

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