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

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

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

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

6. That hella sucks!

7. Band gap in a semiconductor

9. Diode Check valve

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

12. Light Emitting Diode

13. Light Emitting Diode (LED)

14. Diode Laser

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

16. Rectifiers (bridge)

17. Pay Attention!

18. 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

19. Mr. Irish draws on the Board Semiconductor C B E

20. Schematic of a Transistor

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

22. Transistor

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

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

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

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

27. The asymmetrical symmetry Commercial Power DC AC Rectified AC

28. Mr. Irish draws on the board again

29. Schematic of a Laser Pointer

30. Credits Teenage Communication KNPR radio program Diode Laser Diagram http://www.laser- industrial.com/Principles/boxrod.jpg

31. Credits II Diode explanation Wikipedia Diode diagram www.kmitl.ac.th/~kswichit%20/npn/diode. gif Band gap Wikipedia

32. Credits III Transistor photo www.opamp-electronics.com Laser pointer diagram www.reuk.co.uk/What-is-a-Transistor.htm

33. Credits IV Batteries www.chestofbooks.com/crafts/popular- mechanics/Amteur-Work.1/ www.chestofbooks.com/crafts/popular- mechanics/Amteur-Work.1/ Fluid filled glasses graphic http://www.superfocus.com/?gclid=CLTjn_O69rUC FegWMgodWFYAVA