1. Circuit
Circuit – A complete path along which electrons flow (negative to positive)
3 basic types
Series
Parallel
Series-Parallel Combo

2. Series Circuit
Components (resistors, LED’s, batteries) are connected in a line, one after another.
A continuous path for electrons to flow
Series Circuits are very common

3. Series Circuits
In a series circuit, if a lamp 'blows' or a component is disconnected, all the components stop working.
If you put more lamps into a series circuit, the lamps will be dimmer than before.
Uses less wiring than parallel circuits.

4. Parallel Circuits
Are arranged so other parts continue to work even if one part fails.
Common in TV’s, Radios, and stereos
The different components are connected on different wires.

5. Parallel Circuits
In a parallel circuit, if a lamp 'blows' or a component is disconnected from one parallel wire, the components on different wires keep working.
Unlike a series circuit, the lamps stay bright if you add more lamps in parallel.

6. Series-Parallel Combo
Combination of series and parallel circuits

7. Schematics Components and Symbols
LED
Switch

8. Schematic

9. Draw a series circuit:
Using a battery, switch, resistor & 2 LED’s

10. Series Circuit using schematic symbols

11. AC / DC AC: Alternating Current
Electrons keep switching directions, sometimes going "forwards" and then going "backwards."
Generators
Power plants
Wall outlets
DC: Direct Current
Electrons flow steadily in a single direction, or "forward."
Batteries
Solar cells
Fuel cells
Some types of generators