DoElect

1. Using Diode to Drop output voltage Because diodes are capable dropping a voltage of about 0.7v to get it to conduction zone. Because of this, they diodes can be added in series across a power supply in other to limit its output voltage by some fractions. * The software I used was not clear enough, but I guess you will be able to see it.  More diodes can also be added in series to drop the voltage to the desired level. According to the above example: The supply voltage is 9V which was dropped to 7.6V by adding two diodes in series. The simple calculation goes thus: 9V - (0.7 x 2)V = 7.6V The 0.7V arise from the diode voltage drop. 2. Circuit Protection Electrical/electronics Projects got damaged when powered by a voltage of opposite polarity. Because of the ability of diodes to allow current flow in one direction only it can therefore be used as a circuit protector against wrong polarity when placed the proper way.                                           

Diodes are two-terminal semiconductor device that allows current to flow only in one direction. Because of the depletion layer created in between the PN-junction of the diode a voltage greater than the potential has to be applied between the 2-terminal of the diode to get it to the depletion zone. This voltage is 0,7v for a Silicon type diode and 0.3v for a germanium type diode. This however means  that a diode will not conduct immediately in a circuit when a voltage is first apply to it. It will only conduct when the potential voltage of or greater than 0.7v is supply to it. Forward Biased A diode in the forward biased mode allows current to flow freely in a circuit Reversed  Biased  A diode in the reversed biased mode does not allow current flow, it blocks the flow of current in a circuit because the voltage applied to the diode is of opposite polarity. However, all diodes have a characteristics known as the breakdown voltage. Also, when diode is connecte