User talk:Scalpercity

REVIEW OF DIODES FOR ELECTRONIC STUDENTS

WHAT YOU NEED TO KNOW ABOUT DIODES

Conductors have one valence electron, while insulators have none.

Semiconductors have majority carriers of either electros for the N-type material or holes for P-Type material.

The symbol for a diode.

Diode is formed by a P-N junction.

A silicon diode conducts above about 0.7V forward bias.

A reversed biased diode behaves as an open circuit.

There are three diode models of ideal, practial, and detailed.

The dynamic resistance, in ohms, of a P-N junction may be approximated by dividing 25 by the current in mA.

A diode may be used as a switch.

How to test a diode with a multimeter.

How to calculate the maximum current that may be drawn from a Zener diode regulator before the circuit drops out of regulation.

The function of a photodiode.

A surge suppressor may be made from two back-to-back zener diodes.

The main source of voltage surges is lightening strikes on power lines.

The main cause of diode failure is thermal overheating due to excessive current.

BUILD

A clipper circuit

A clamping circuit

DRAW AND DESCRIBE

The schematic for a half-wave rectifier, including a filter capacitor.

The schematic for a full wave rectifier, including a filter capacitor.

The block diagram of a complete power supply unit consisting of a rectifier (half or full wave), a filter, and a regulator.

The circuit of a zener diode regulator.

BE ABLE TO DRAW

The circuit associated with an LED and be able to calculate the value of the series current limiting resistor.