# ECE 252 Introduction to Electrical Engineering

## Module 18. Batteries, Voltage Regulators, Transformers, and Sensors

Course Objectives/Outcomes: Students who complete this course will be able to:

• Select an appropriate battery type (primary, secondary, Ni-Cd, etc.) for a given application.
• Analyze simple transformer circuits.
• Apply various sensors (light, temperature, strain, etc.) and correctly consider sensor impedance in circuit design and analysis.

Module Objectives/Outcomes: Students who complete this module will be able to:

1. Remember the nominal voltages of common batteries.
2. Specify the appropriate battery for a given application.
3. Consider internal resistance in battery current calculations.
4. Calculate the required capacity of a battery for a given application.
5. Sketch and label a linear voltage regulator circuit.
6. Calculate voltage, current, power, and power loss in a linear voltage regulator circuit.
7. Sketch and label a transformer circuit.
8. Use the ideal transformer equation to calculate voltage and current in a transformer circuit.
9. Consider apparent power to determine if a transformer is operating within its safe range.
10. Analyze circuits that include sensors and amplifiers to calculate voltage and current.
11. Recognize and avoid ground loops.
12. Select appropriate cabling for single-ended and differential amplifiers in noisy environments.
13. Select an appropriate light bulb (incandescent, CFL, or LED) for a given application.

#### Assignment:

• Read Lesson 18. [Module Objectives 1-13]
• Watch the videos. [Module Objectives 1-13]
• Solve Tutorial 18. [Module Objectives 1-13]
• Solve and submit Homework 18. [Module Objectives 1-13]
• Solve Practice Quiz 18. Try to do it in under 20 minutes. [Module Objectives 1-13]
• Check your practice quiz answers against the solution below. [Module Objectives 1-13]
• Now you should be ready for Quiz 18. [Module Objectives 1-13]

#### Select an option:

Lesson 18 Batteries, Voltage Regulators, Transformers, and Sensors

##### Streaming Videos

Video L18-1 Battery Basics Part 1. [Module Objectives 1, 2, and 4]

Video L18-2 Battery Basics Part 2. [Module Objectives 1, 2, and 4]

Video L18-3 Battery Basics Part 3. [Module Objectives 1-3 and 13]

Video L18-4 Voltage Regulators. [Module Objective 5 and 6]

Video L18-5 Transformers Part 1. [Module Objectives 7-9]

Video L18-6 Transformers Part 2. [Module Objectives 7-9]

Video L18-7 Transformer Example. [Module Objectives 7-9]

Video L18-8 Transformer Simulation. [Module Objectives 7-9]

Video L18-9 Sensors. [Module Objective 10]

Video L18-10 Wheatstone Bridge. [Module Objective 10]

Video L18-11 Sensor Properties. [Module Objective 10]

Video L18-12 Photodiode. [Module Objective 10]

Video L18-13 Thermistor. [Module Objective 10]

Video L18-14 Measurement Errors. [Module Objectives 11 and 12]

Video L18-15 Noise and Cabling. [Module Objectives 11 and 12]

Video L18-16 Review. [Module Objectives 1-13]

Video L18-1 Battery Basics Part 1. [Module Objectives 1, 2, and 4]
Video L18-2 Battery Basics Part 2. [Module Objectives 1, 2, and 4]
Video L18-3 Battery Basics Part 3. [Module Objectives 1-3 and 13]
Video L18-4 Voltage Regulators. [Module Objective 5 and 6]
Video L18-5 Transformers Part 1. [Module Objectives 7-9]
Video L18-6 Transformers Part 2. [Module Objectives 7-9]
Video L18-7 Transformer Example. [Module Objectives 7-9]
Video L18-8 Transformer Simulation. [Module Objectives 7-9]
Video L18-9 Sensors. [Module Objective 10]
Video L18-10 Wheatstone Bridge. [Module Objective 10]
Video L18-11 Sensor Properties. [Module Objective 10]
Video L18-12 Photodiode. [Module Objective 10]
Video L18-13 Thermistor. [Module Objective 10]
Video L18-14 Measurement Errors. [Module Objectives 11 and 12]
Video L18-15 Noise and Cabling. [Module Objectives 11 and 12]
Video L18-16 Review. [Module Objectives 1-13]

##### Bonus Material

Battery Basics (Power Point)

##### Tutorials

Tutorial 18 Batteries and Voltage Regulators. [Module Objectives 1-6]
Tutorial 18A Transformers and Sensors. [Module Objectives 7-13]

##### Practice Quiz

Practice Quiz 18. [Module Objectives 1-13]
Practice Quiz 18 Solution. [Module Objectives 1-13]