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Showing posts from July, 2014

Capablanca Positions Unraveled

Perhaps the most challenging and exciting end-games for me as a beginner in chess are the Capablanca positions, where a series of pawns of the same number and an equal amount of officials by value (usually a single bishop/horse) are left on both sides. One simple mistake can be critical and could easily be the deciding factor of a game. Perhaps a strong mental intuition is required to gain an advantage in such an end-game.

     Let us take an example below: (White to move)



     Try and compare 2 moves: Nd2 with the intention of supporting the advance of c4, and d4 with the intention of supporting c5.


Which move is the best? Both seem harmless enough to the new eye.


Let us first have a closer look at Nd2.

Nd2        C5

D4          ...

Why not bxc5? Well bxc5 Bxc5 threatens a3 and g3.

...          dxc4
cxd4      Kb6
Nf3        a5
(by now, white should realize the growing trouble at the left side of the board)
e5         axb4    (white is attempting to break the defense at the righ…

Fast Facts: Analysis of Line Regulation of Different Voltage Regulators Unraveled

 Voltage regulators (as the name implies) regulate a certain amount of input bias to a specified voltage level. A zener diode is the most basic of all voltage regulators, though it is characterized by a significant amount of voltage drop across it. If we want a low voltage drop across our regulator, low drop-out (LDO) voltage regulators are available. They may come in a variety of packages and even offer extra features (such as the TPS7333QP which offers an extra "reset" function to shut down its load (microcontroller) in the event of an undervoltage condition).


     One important characteristic to look at in voltage regulators is their line regulation. Line regulation (as the name implies again) is a measure of how well the line voltage is maintained with respect to a varied input bias. For example, if we feed a voltage regulator with 7 V, it yields a 5 V output. But when we feed it with 13 V, line voltage/output becomes 5.3 V. Thus we can say that our sample voltage regul…