1. Basic Circuits
TEST YOUR BRAIN!

2. Creates a set
voltage
Potential Dividers

3. Potential Divider Vout = 10 x 100 = 1000 = 5V 100 +100 200
R1 = 100
Vs = 10V
R2 = 100
Vout = 5V
Vout = 10 x 40 = 400 = 6.6V
R1 = 20
Vs = 10V
R2 = 40
Vout = 6.6V
Vout = 10 x 20 = = 3.3V
R1 = 40
Vs = 10V
R2 = 20
Vout = 3.3V R1 R2 Vs
Vout = Vs x R2
R1 + R2

4. Creates an adjustable
voltage
Potentiometer

5. Potentiometer
10V
10V
VR1
Volts

6. Potentiometer
10V
7.5V
VR1
Volts

7. Potentiometer
10V
VR1 5V
Volts

8. Potentiometer
10V
VR1
2.5V
Volts

9. Potentiometer
10V
VR1 0V
Volts

10. Converts a light
level into
a voltage
LDR Potential Divider

11. LDR Potential Divider
10V
Vout
Volts
LDR
Resistance

12. LDR Potential Divider
10V
Vout
Volts
LDR
Resistance

13. LDR Potential Divider
10V
Vout
Volts
LDR
Resistance

14. LDR Potential Divider
10V
Vout
Volts
LDR
Resistance

15. LDR Potential Divider
10V
Vout
Volts
LDR
Resistance

16. Compares two
different input
voltages
Comparator

17. Inverting > Non-inverting
Comparator
Inverting > Non-inverting

18. Inverting = Non-inverting
Comparator
Inverting = Non-inverting

19. Inverting < Non-inverting
Comparator
Inverting < Non-inverting

20. LED lights on
when it is dark
Light Sensor

21. Light Sensor - + Vout 10V Inverting input voltage Output voltage LDR
Resistance
Non-Inverting input
voltage

22. Light Sensor - + Vout 10V Inverting input voltage Output voltage LDR
Resistance
Non-Inverting input
voltage

23. Light Sensor - + Vout 10V Inverting input voltage Output voltage LDR
Resistance
Non-Inverting input
voltage

24. Light Sensor - + Vout 10V Innverting input voltage Output voltage LDR
Resistance
Non-Inverting input
voltage

25. Produces
continuous pulses
555 Timer Astable Circuit

26. 555 Astable Circuit
F =
(R1+2R2) x C1

27. 555 Astable Circuit
SMALL
CAPACITOR
HIGH
FREQUENCY

28. 555 Astable Circuit
LARGE
CAPACITOR
LOW
FREQUENCY

29. 555 Timer Monostable Circuit
Produces a
pulse of a set
length
555 Timer Monostable Circuit

30. 555 Monostable Circuit
T = 1.1 x C1 x R1

31. 555 Monostable Circuit
Output
Trigger

32. 555 Monostable Circuit

33. Field Effect Transistor (FET)
Allows a voltage to
control a large
Current.
Field Effect Transistor (FET)

34. Transistor Driver A small current on the base creates a large current
through the
speaker
Transistor Driver C B E

35. Transistor Driver A small current on the base creates a large current
through the
lamp
Transistor Driver C B E

36. Field Effect Transistor (FET)

37. FET Driver A voltage on the gate controls the current through
the lamp.
FET Driver D G V S

38. Logic Gates

39. AND

40. AND Gate
A=0 A B
Q=0 Q
B=0
Truth Table A B Q

41. AND Gate
A=0 A B
Q=0 Q
B=1
Truth Table A B Q 1

42. AND Gate
A=1 A B
Q=0 Q
B=0
Truth Table A B Q 1

43. AND Gate
A=1 A B
Q=1 Q
B=1
Truth Table A B Q 1

44. OR

45. OR Gate A
A=0
Q=0
B=0 Q B
Truth Table A B Q

46. OR Gate A
A=0
Q=1
B=1 Q B
Truth Table A B Q 1

47. OR Gate A
A=1
Q=1
B=0 Q B
Truth Table A B Q 1

48. OR Gate A
A=1
Q=1
B=1 Q B
Truth Table A B Q 1

49. NOT

50. NAND

51. NOR

52. Resistor A resistor limits the amount of current flowing in a circuit
Symbol