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TEST
YOUR
BRAIN!
Potential
Dividers
Creates a set
voltage
Potential Divider
R1 = 100
Vs = 10V
Vs
R1
Vs = 10V
R1 = 20
Vout = 5VVs = 10V
R2 = 100
Vout = 6.6V
R2 = 40
R1 = 40
Vout = 3.3V
R2 = 20
Vout = Vs x R2
R1 + R2
Vout = 10 xVout
100 == 1000
= 5V
== 10
x 20
= 200 = 3.3V
10 xVout
40
400
= 6.6V
40+20
60
100 +100 R2
200
20 + 40 60
Creates an adjustable
voltage
Potentiometer
Potentiometer
10V
10V
VR1
Volts
Potentiometer
10V
VR1
7.5V
Volts
Potentiometer
10V
VR1
5V
Volts
Potentiometer
10V
VR1
2.5V
Volts
Potentiometer
10V
VR1
0V
Volts
Converts a light
level into
a voltage
LDR
Potential Divider
LDR Potential Divider
10V
Vout
Volts
LDR
Resistance
LDR Potential Divider
10V
Vout
Volts
LDR
Resistance
LDR Potential Divider
10V
Vout
Volts
LDR
Resistance
LDR Potential Divider
10V
Vout
Volts
LDR
Resistance
LDR Potential Divider
10V
Vout
Volts
LDR
Resistance
Compares two
different input
voltages
Comparator
Comparator
Inverting > Non-inverting
Comparator
Inverting = Non-inverting
Comparator
Inverting < Non-inverting
Light
Sensor
LED lights on
when it is dark
Light Sensor
Inverting input
voltage
+
10V
Vout
Output voltage
LDR
Resistance
Non-Inverting input
voltage
Light Sensor
Inverting input
voltage
+
10V
Vout
Output voltage
LDR
Resistance
Non-Inverting input
voltage
Light Sensor
Inverting input
voltage
+
10V
Vout
Output voltage
LDR
Resistance
Non-Inverting input
voltage
Light Sensor
Innverting input
voltage
+
10V
Vout
Output voltage
LDR
Resistance
Non-Inverting input
voltage
Produces
continuous pulses
555 Timer
Astable Circuit
555 Astable Circuit
F=.
1.44
(R1+2R2) x C1
.
555 Astable Circuit
SMALL
CAPACITOR
HIGH
FREQUENCY
555 Astable Circuit
LARGE
CAPACITOR
LOW
FREQUENCY
Produces a
pulse of a set
length
555 Timer
Monostable Circuit
555 Monostable Circuit
T = 1.1 x C1 x R1
555 Monostable Circuit
Output
Trigger
555 Monostable Circuit
Allows a voltage to
control a large
Current.
Field Effect Transistor
(FET)
Transistor Driver
A small current on
the base creates
a large current
through the
speaker
C
B
E
Transistor Driver
A small current on
the base creates a
large current
through the
lamp
C
B
E
Field Effect Transistor
(FET)
FET Driver
A voltage on the
gate controls the
current through
the lamp.
D
G
V
S
Logic
Gates
AND
AND Gate
A
A=0
Q=0
B=0
Truth Table
A
B
Q
0
0
0
B
Q
AND Gate
A
A=0
Q=0
B=1
Truth Table
A
B
Q
0
0
0
0
1
0
B
Q
AND Gate
A
A=1
Q=0
B=0
Truth Table
A
B
Q
0
0
0
0
1
0
1
0
0
B
Q
AND Gate
A
A=1
Q=1
B=1
Truth Table
A
B
Q
0
0
0
0
1
0
1
0
0
1
1
1
B
Q
OR
OR Gate
A
A=0
Q=0
B=0
B
Truth Table
A
B
Q
0
0
0
Q
OR Gate
A
A=0
Q=1
B=1
B
Truth Table
A
B
Q
0
0
0
0
1
1
Q
OR Gate
A
A=1
Q=1
B=0
B
Truth Table
A
B
Q
0
0
0
0
1
1
1
0
1
Q
OR Gate
A
A=1
Q=1
B=1
B
Truth Table
A
B
Q
0
0
0
0
1
1
1
0
1
1
1
1
Q
NOT
NAND
NOR
Resistor
A resistor limits
the amount
of current
Symbol
flowing in a circuit