1. Environment and teaching kits
Andrzej Kotlicki
Physics and Astronomy

2. Voltage, Current, Resistance, Power
R = V/I
P =IV = V2/R = I2R

3. Multimeters Measuring voltage current resistance Precautions
Current fuse – when it burns?
Measure resistance outside the circuit

4. SOLDERLESS BREADBOARD

5. Breadboard (design board)
connections between the holes are shown in red
Use only the specified wire

6. Light Emitting Diodes LEDs
voltage –current characteristics,

7. 360 9V Light Emitting Diodes LEDs example circuit
In principle we need a current source, very often IC
direction
360 9V

8. Solar Panels How they work?
Power – notice that both voltage and current changes with light intensity
Maximum power and load

9. Gearbox Purpose Role in wind and water turbines.
Our little crank turbine
How hard it is to turn – try with incandescent bulb an LED

10. Light sources Incandescent
Fluorescent and low voltage (12V) fluorescent
LED
Reasons for efficiency.
Spectrum
Coming ways of illuminating

11. Kill-a-Watt meter
Use.
Example with 3 kinds of lights of the same intensity

12. Issues with green electrical power
Solar, wind and hydro
Nuclear
Why we use AC? What is AC
The implications for the grid
Global grid?
DC power lines?
Superconducting power lines?