1. E LECTRICAL E NGINEERING Mr. Kerins

2. E LECTRICAL ENGINEERING Definition- is the design and construction of electrical and electronic components and devices 21% of all engineers are Electrical

3. E LECTRICAL E NGINEERING D EGREE R EQ ’ S Coursework: Electricity Electronics Chemistry Biology Physics High level Math Statistics

4. IEEE Institute of Electrical and electronics Engineers 375,000 members 160 Countries Goal and Purpose; Dedicated to advancing technological innovation and excellence through their publications, conferences, standards, and activities

5. E LECTRONIC B ASICS Flow of Electrons Negative to Positive Moving At Speed of Light (24 x around earth in 1 second) Schematics are a must

6. E LECTRONIC B ASICS 3 Requirements for a complete circuit Source Load Path

7. T YPES O F ELECTRICAL C IRCUITS Engineers must weigh unique benefits and drawbacks for each given circuit Circuits can be designed in three ways: Series Parallel Series in Parallel

8. S IMPLE C IRCUITS Source Load Path

9. S ERIES C IRCUITS Has only ONE path for electrons/current to flow Runs through each load back to source Voltage drop is same among all loads If path or load is broken will not work

10. P ARALLEL CIRCUITS Have multiple paths and more than one load. Voltage across each path is equal to source voltage

11. P ARALLEL VS S ERIES CIRCUITS

12. S OLDERING A must for electronics A fusion of allows which have a low melting point Makes Connections Permanent and electrons flow Allow Combination of two or more metals

13. S OLDER Definition:- combination of lead and tin in various ratios 60/40 solder Avoid acid core solder Used in electronics and plumbing Low melting point among metals – 375degrees F(avg)

14. S OLDER SAFETY Wear Safety Goggles Avoid contact with skin and eyes Conscience of soldering iron tip Avoid Fumes- ventilation Cold Solder Joint Don’t interrupt someone who is soldering

15. S OLDERING – P ROJECT Wire Strip 5 Wires and Solder them together safely

16. O HMS L AW Relationship between resistance, current, and voltage in electrical circuits. Extremely important component in electrical engineering Discovered by German Physicist George Ohm

17. O HMS L AW E – Electromotive Force Amount of pressure causing electrons to flow Greater the pressure of electrons higher the voltage Measured in Voltage Could See “E” or “V” E = I (R)

18. O HMS L AW Resistance – Opposition of current flow. Measured in ohms Resistors are used to limit current flow and divide voltage Resistor- Color band codes Variable vs. Fixed Resistors R = E/I

19. O HMS L AW Intensity- Measure of the flow of electrons per unit of time. Also known as Coulomb, current or intensity I or A can be used for symbols of intensity Measured in Amps I = E/R

20. O HMS L AW Power- product of current and voltage Measured in watts One watt is equal to one volt moving one amp of electricity at one second P = I(E)

21. E LECTRICAL E NGINEERING PROJECT Line following mouse? Breadboard? Solder Project?