Day 116, Tuesday, 8 March, 2016 Diodes and Transistors Warm Up Teenage Communication Electronics Diodes rectifiers Transistors Amplifiers Elements in Logic.

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Presentation transcript:

Day 116, Tuesday, 8 March, 2016 Diodes and Transistors Warm Up Teenage Communication Electronics Diodes rectifiers Transistors Amplifiers Elements in Logic Circuits

Warm Up Answers 52. V = IRD 15 volts 54. V = IRI = V/RB 3.0 amps

Batteries wired in Series and in Parallel (increases volts) (increases Amps)

Teenage Communication 1/3 of teenage communication is accomplished with 20 words.

That hella sucks!

Band gap in a semiconductor

Diode Check valve

P-N Junction in a Diode Negatively doped region: atoms that donate electrons Positively doped region: atoms that accept electrons (holes)

Light Emitting Diode

Light Emitting Diode (LED)

Diode Laser

Diodes (used in rectifiers) Allows one way flow of current

Rectifiers (bridge)

Pay Attention!

Transistor A transistor is a semiconductor device that uses a small amount of voltage or electrical current to control a larger change in voltage or current. Wikipedia

Mr. Irish draws on the Board Semiconductor C B E

Schematic of a Transistor

Labeling of the Transistor Leads In Academics: Collector, Base, Emitter In Industry: Source, Gate, Drain

Transistor

Two uses for transistors 1. Amplifier 2. Element in a logic circuit

Two uses for transistors 1. Amplifier Weak signal to powerful output 2. Element in a logic circuit Series: “and gate” Parallel: “or gate”

The Transistor as Amplifier Phones, radios, TVs, stereos, etc.

The Transistor as element in a Logic Circuit “and” gates (wired in series) “or” gates (wired in parallel)

The asymmetrical symmetry Commercial Power DC AC Rectified AC

Mr. Irish draws on the board again

Schematic of a Laser Pointer

Credits Teenage Communication KNPR radio program Diode Laser Diagram industrial.com/Principles/boxrod.jpg

Credits II Diode explanation Wikipedia Diode diagram gif Band gap Wikipedia

Credits III Transistor photo Laser pointer diagram

Credits IV Batteries mechanics/Amteur-Work.1/ mechanics/Amteur-Work.1/ Fluid filled glasses graphic FegWMgodWFYAVA