Basic Electricity so we can build a simple circuit

1. Introduction to Robotics
What are Robots

2. Review
•What is energy
•What is mechanical and electrical power

3. Overview
•Electricity
•Ohms Law

4. What is
Electricity
Flow of
electrons

5. What is
Electricity
Flow of
electrons

6. Ohms Law
E = IR
Voltage = Current X Resistance
E = Voltage (Volts)
I = Current (Amps)
R = Resistance (Ohms)

7. What is
Electrical
Power?
The more electricity
(voltage) you have to
power more things
X
How much of it you
can push through
(current)

8. Voltage
•Voltage is
measured in
“volts”
•Voltage is how
much electricity
is contained

9. Current
•Current is
measured in
amps
•Current is how
much electricity
is being pushed
out

10. Resistance
•Resistance is
measured in
Ohms
•Resistance is
things that stop
or slow down
the Current

11. Knowing the formula, figure out the
following:
Voltage = Volt (V)
Current = Amps (I)
Resistance = Ohms (R/ Ω)

12. Knowing the formula, figure out the
following:
Voltage = Volt (V)
Current = Amps (I)
Resistance = Ohms (R/ Ω)
9 Volts/ 10 Ohms =??? Current
9/10 = .9 Amps

13. Knowing the formula, figure out the
following:
Voltage = Volt (V)
Current = Amps (I)
Resistance = Ohms (R/ Ω)

14. Assignment Today
(due today)
•Brown Book (large snap kits)
•Activities 1-5
•Write down observation

15. Assignment Today
(due next class)
•Make a circuit for each of the following
• LED light
• Lamp
• Motor
•Include a switch and power source
•Switch positive and negative terminals
•Write observation

16. Assignment Today
(due next class)
•Chapter 8: Electricity to Electronics
•Numbers 1 – 8 (pg 58)
•Can work in groups, can use calculators
•If finish fast, have alternate assignment with
snap circuitry