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Electronics II

Electronics II. Review last class Introduce Components Introduce Circuit Concepts Basic math that regulates use of electricity Applying Concepts to Circuits. Electronics II - Objectives. We can’t live without electronics Electrons flow between atoms

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Electronics II

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  1. Electronics II

  2. Review last class Introduce Components Introduce Circuit Concepts Basic math that regulates use of electricity Applying Concepts to Circuits Electronics II - Objectives

  3. We can’t live without electronics Electrons flow between atoms We can control electron flow to do work for us – light, music, control aircraft We created a power source, potato battery, and built a simple light circuit Electronics II - Review

  4. Atoms- Protons, Neutrons, and Electrons Protons - Positive Charge Electrons – Negative Charge Neutrons – No Charge Electronics II – Electricity Basics Copper Atom

  5. Valence Electrons can: Orbit their nucelus Escape as a free electon Be pushed to another atom (electrical current) Electronics II – Electricity Basics Copper Atom

  6. Free Electrons wander Put a power source to it …..and electrons move towards the positive charge Electronics II – Electricity Basics Copper Wire

  7. Safety First Human bodies run on electrical current Large amount of electricity can kill A downed power line carries many amps and is dangerous We will only be working with milliamps Parts we are using can be damaged of used wrong Electronics II

  8. Electronics II - Components

  9. Voltage, Volts – amount of electric push Resistance, Ohms – component or circuit’s opposition to electric flow Amperage, Amps – amount of electric flow Watts – a measure of electrical power Electronics II – Concepts

  10. Power source Power usage Under power – Circuit doesn’t work Overpower – Burnouts Electronics II – Concepts

  11. Volts Push Amps are electrons flowing Ohms oppose electron flow Electronics II – Circuit Math

  12. Ohm’s Law Current (I) = Volts (V) divided by Resistance (Ω) Electronics II – Circuit Math

  13. Volts = V Current = I = Amperes = Amps = A Milliamps = mA, Microamps = μA Resistance = R = Ohms = Ω Electronics II – Circuit Math

  14. Three ways to represent the formula Electronics II – Circuit Math

  15. Electronics II – Circuit Diagrams

  16. Electronics II – Circuit Diagrams

  17. Let’s Build it Ourselves

  18. Electronics II – LED with Switch

  19. Electronics II – LED with Switch 20 mA = .020 A R = 4V / .020 A

  20. Electronics II – LED with Switch

  21. Electronics II – LED with Switch

  22. Use power rails Slide switch + in Row 3 - in Row 4 LED + in Row 4 - in Row 6 - Row 6 to Power Rail Electronics II – LED with Switch

  23. Electronics II – LEDs in Parallel

  24. Electronics II – LEDs in Parallel

  25. Resistor before switches Electronics II – LEDs in Parallel Switches in Columns a & d + Jumpers in Column e LED + in Col e Keep LEDs and - jumper in same row

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