1. Basic Electronic Components

2.  An electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields. Electronic components are mostly industrial products, available in a singular form and are not to be confused with electrical elements, which are conceptual abstractions representing idealized electronic components.electronselectrical elements

3. The Power Source  Or power supply is a device that supplies electric power to an electrical load. electric powerelectrical load  A regulated power supply is one that controls the output voltage or current to a specific value.regulated power supply

4. Types of Power Supply  Battery Battery  DC Power Source DC Power Source  AC Power Source AC Power Source

5. Battery  A battery is a device that converts stored chemical energy to electrical energy. Batteries are commonly used as energy sources in many household and industrial applications.  Primary batteries (disposable)  Secondary batteries (rechargeable)

6. DC (Direct Current) Power Source  Current and voltage is supplied as a continuous or direct signal, which can be represented as a straight horizontal line in either a voltage or current vs. time graph  DC voltages usually range from 1.5 V to 12 V for household devices to as high as 24 – 28 V for industrial machines.

7. AC (Alternating Current) Power Source  An AC power supply typically takes the voltage from a wall outlet (mains supply) and lowers it to the desired voltage. Some filtering may take place as well.mains supply  AC voltages usually are from 150 – 250 V, divided into to two ranges, 100 – 120 V used in many western countries, and 220 to 240 V here in the Phils.

8. Resistors  A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. Resistors act to reduce current flow, and, at the same time, act to lower voltage levels within circuits.passivetwo-terminalelectrical componentelectrical resistance  Are components that have a definite resistance. *Resistance is measured in ohms (Ω).  A resistor could have a resistance as low as 10 ohms Ω to as high as 10 000 000 Ω  Resistors are current limiters and distributors.

9.  The current through a resistor is in direct proportion to the voltage across the resistor's terminals. This relationship is represented by Ohm's law:currentdirect proportionvoltageOhm's law  where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms (symbol: Ω). conductoramperesvolts ohms

10.  The current through a resistor is in direct proportion to the voltage across the resistor's terminals. This relationship is represented by Ohm's law:currentdirect proportionvoltageOhm's law  where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms (symbol: Ω). conductoramperesvolts ohms

11. Fixed Resistor  A resistor having a fixed, defined electrical resistance which is not adjustable.

13. Valuable Resistor  Variable resistors, or as they are often called potentiometers are used in many areas of electronics. They are used for volume and gain controls as well as a variety of other applications.

14. Resistors in series  Two elements are said to be in series whenever the same current physically flows through both of the elements. The critical point is that the same current flows through both resistors when two are in series. The particular configuration does not matter. The only thing that matters is that exactly the same current flows through both resistors. Current flows into one element, through the element, out of the element into the other element, through the second element and out of the second element. No part of the current that flows through one resistor "escapes" and none is added.

15. This figure shows several different ways that two resistors in series might appear as part of a larger circuit diagram.

16. Resistors in Parallel  Resistors are said to be connected together in “ Parallel ” when both of their terminals are respectively connected to each terminal of the other resistor or resistors.

17. Example of a circuit containing three resistors connected in parallel Circuit containing resistors in parallel, equivalent to Figure 1

18. Switches  Devices that create a short circuit or an open circuit depending on the position of the switch.  It can break an electrical circuit, interrupting the current or diverting it from one conductor to anotherelectrical circuitcurrent  If a switch is ON, it acts like a wire.  If a switch is OFF, there is no connection.

19. Sources  http://electronicsclub.info/variableresistors.htm http://electronicsclub.info/variableresistors.htm  http://www.tufts.edu/programs/mma/emid/variableresistor s.html http://www.tufts.edu/programs/mma/emid/variableresistor s.html  http://www.resistorguide.com/fixed-resistor/ http://www.resistorguide.com/fixed-resistor/  Direct current - Wikipedia, the free encyclopedia Direct current - Wikipedia, the free encyclopedia  Electronic component - Wikipedia, the free encyclopedia Electronic component - Wikipedia, the free encyclopedia  http://www.facstaff.bucknell.edu/mastascu/elessonshtml/R esist/Resist2.html http://www.facstaff.bucknell.edu/mastascu/elessonshtml/R esist/Resist2.html  http://www.physics.uoguelph.ca/tutorials/ohm/Q.ohm.intro.parallel.html http://www.physics.uoguelph.ca/tutorials/ohm/Q.ohm.intro.parallel.html  http://www.electronics-tutorials.ws/resistor/res_4.html http://www.electronics-tutorials.ws/resistor/res_4.html  http://www.facstaff.bucknell.edu/mastascu/elessonshtml/R esist/Resist2.html http://www.facstaff.bucknell.edu/mastascu/elessonshtml/R esist/Resist2.html  Resistor - Wikipedia, the free encyclopedia Resistor - Wikipedia, the free encyclopedia  Digital electronics - Wikipedia, the free encyclopedia Digital electronics - Wikipedia, the free encyclopedia