Republic of the Philippines Department of Education Regional Office IX, Zamboanga Peninsula

Zest for Progress

Zeal of Partnership 9

TLE/TVL

Computer Systems Servicing

Quarter 3- Module 7

Terminate /Connect Electrical Wiring/ Electronic Circuits

Name of Learner: ______Grade & Section: ______Name of School: ______

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TLE/TVL– Grade 9 Computer System Servicing Alternative Delivery Mode Quarter III – Module 7: Terminate/ Connect electrical wiring/electronic circuits First Edition, 2020

Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.

Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.

Published by the Department of Education Secretary: Leonor Magtolis Briones Undersecretary: Diosdado M. San Antonio

Development Team of the Module

Writer: Hazel P. Bacasmo

Reviewer: Evelyn C. Labad EdD, Nilda Y. Galaura EdD

Editor: James L. Colaljo MAEM

Illustrators: Myrlan R. Realiza Jezel Joy D. Cabrera Layout Artist: Myrlan R. Realiza Jezel Joy D. Cabrera

Management Team: SDS: Ma. Liza R. Tabilon EdD, CESO V

ASDS: Judith V. Romaguera EdD

OIC-ASDS: Ma. Judelyn J. Ramos EdD

OIC-ASDS: Armando P. Gumapon EdD

CID Chief: Lilia E. AbelloEdD

LR : Evelyn C. Labad EdD

PSDS: Ma. Theresa M. Imperial EdD

Principal: Nilda Y. Galaura EdD

Printed in the Philippines by ______Department of Education –RegionIX

Office Address: ______Telefax: ______

E-mail Address: ______

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What I Need to Know

This module is a one-lesson module. It covers key concepts ofterminating / connecting electrical wiring/electronic circuits.

In this lesson you will learn to:

• Identify methods in connecting and terminating wire; • Devise a simple circuit diagram on any electronic circuits; • Appreciate the importance of adhering to safety procedures in using tools when terminating/connecting electrical/electronic circuits.

WIRE TERMINATION/CONNECTION Lesson 1 METHODS AND SAFETY

PROCEDURES

What’s In

Activity 1

Directions: Do the activity below. 1. Given the set of scrambled letters, form the word out of the letters below. NLAP

2. Once you have formed the word, write it in your activity notebook. 3. Then below, you will find again another set of scrambled letters. Form again the word out of the letter inside the box. 4. Form the word again and write it in your activity notebook.

MTEARIENT

5. Now that you have formed the two words, make a statement that emphasizes the connection of the two words. In writing, you can state how word 1(first word form)is related to word 2 (the second word) form.

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What’s New

Activity 2:

In this activity, you are going to make observations on the two pictures below. Write your observation on a sheet of paper.

Figure 1

Figure 2

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What is It

PARTS OF A SIMPLE CIRCUIT A simple circuit contains the minimum things needed to have a functioning electrical circuit:

1. Source- adeviceusedtosupplyACorDCvoltage.

2. Consuming- any device that consumes voltage, whatever component or piece of equipment that is connected to as source and draws current from a source is a load on that source.

3. Controlling- any device having two states, ON (closed) and OFF (open). Ideally having zero impedance when closed and infinite impedance when open. 4. Protecting- a component used to open the circuit when current exceeds a predetermined maximumvalue. 5. Connecting- amaterialthatconductselectriccurrentverywellandusedto connectacompletepathforcurrent.

Electrical termination of a signal involves providing a terminator at the end of wire or cable to prevent aRadio Frequency (RF) signal from being reflected back from the end, causing interference. The terminator is placed at the end of a or daisy chain (such as in SCSI), designed to match impedance and hence minimize signal reflections.

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ELECTRICAL CONNECTIONS

Whether you are adding new electrical gear or rewiring something already aboard, the requirements for reliable and safe electrical connections are the same. You need the right wire, the right terminal fittings, and a couple of inexpensive hand tools.

WIRE TERMINATION/WIRE CONNECTION

A wire termination is the work performed to the end of a wire that allows it to connect to a device (connector, switch, terminal, etc.). Wire connection is a task performed to extend the cable or wire in a circuit.

CATEGORIES OF WIRE TERMINATION

1. A crimp termination is performed when the device requires a contact or terminal. The wire insulation is stripped, and the contact or terminal is attached to the wire using a crimp tool. The tool crimps the contact or terminal onto the wire conductor. 2. A solder termination is performed when the wire conductors attach directly to the device. This requires stripping off the wire insulation and applying flux and solder to connect the wire to the device.

METHODS OF WIRE TERMINATION

1. O-Ring Termination – a popular type of connecting a power source to a lighting fixture. 2. Power Cable Termination- a very common type of connector and is often used within basic appliances and less critical applications.

METHODS OF CONNECTING WIRE

1. Soldering - A much better way is to solder the wires together. Twist the strands as before, use something to hold them in place and use a soldering iron. The easiest way is to use a flat tip which you then place under the wires. This will ensure that the wires get hot enough and make a good connection with the solder. Don't push the solder against the iron to melt it but only touch the wires instead.

Figure 1

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2. Tape it together - The first method is quick and easy, but I wouldn't use it for anything but a very short term solution until you can make a better connection. Begin by twisting the wire strands together as tightly as you can. Finish off by applying electrical tape around the twisted part for insulation. The tape will also provide a bit of strength Figure 2 by holding the two wires together.

3. Solder and seal connectors - It's an easy and effective solution, but the connectors are a bit more expensive. This method was actually used during the WW2 to quickly repair broken wires on the field. Figure 3

4. Push in wire connectors - Using push-in wire connectors, you simply push in both wires and you're done. This is probably the best option if you have to connect multiple wires at once, as you can buy connectors with more than two Figure 4 slots.

5. Dupont Connectors- They are used on a lot of electronicequipment, including extensively on Arduino and PC's. They're great for quickly connecting things together. They're also perfect for replacing different parts, as you can swap anything in

seconds. You will need to buy both Figure 5 male and female connectors, as well as the plastic cases and a special crimping tool.

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6. Quick splice connector- The last method is fast and easy and you don't even have to use any tools at all. You simply insert the wires on both ends, without cutting the insulation, and push down the pins. It will cut through the shielding into the wire and create an electrical connection.

Figure 6

PROCEDURE IN CIRCUIT DESIGNING

1. Prepare all the tools and materials needed. 2. By using schematic symbol, make a simple circuit with the following: a. load b. consumingdevice c. protectingdevice d. consumingdevice e. connectingdevice 3. Make sure that the circuit has the following requirement that a simple circuit musthave: a. A source of electrical potential difference or voltage. b. A conductive path which would allow for the movement of charges. c. An electrical resistance which is loosely defined as any object that uses electricity to do work. 4. Testthedesignedcircuit.

SAFETY PRECAUTIONS WHEN TERMINATING/ CONNECTING WIRES

• When wiring, please be sure to turn off the power. Also, while the power is on, please keep the cover closed and do not touch the terminal. • Please apply the correct voltage to the input terminal. If the correct voltage is not applied, regular functions may not run, and this may lead to damage or fire to the product. • Please follow the voltage specifications for terminal polarity, transmission circuits and electrical wiring for I/O jumpers. If errors are made, this may lead to malfunctions.

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• Please do not remove a connector while the power is on, as this may lead to malfunctions.

What’s More

ACTIVITY 3:

Directions: Identify what method in terminating and connecting wires in column Bmatches with the data in column A. Write only the letter on the space before the number.

COLUMN A COLUMN B

______1.It is commonly used on electronic a.Tape it together equipment.

______2. The wire insulation is stripped, and the b.Push-in wire contact or terminal is attached to the wire using a connectors crimp tool.

______3. Finish off by applying electrical tape c.Dupont Connectors around the twisted part for insulation.

______4.Simply push in both wires and you're d.Soldering done.

______5. Twist the strands as before, use something to hold them in place and use a soldering e.Crimping iron.

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What I Have Learned

ACTIVITY 4

Directions: Fill in the blank with the corresponding correct word to complete the paragraph.

Wire termination and connection are the foundation of a circuit. A simple circuit is made of basic parts. First is the (1)______that supplies current to the circuit. Then the consuming devices that consumes voltage. Controlling devices are the ones that control the flow of the current and has two states, (2)______and OFF. Protecting components are used to protect the circuit from excessive current. And lastly, connecting devices completes the path for the current to flow from the Source to the consuming devices.

In electronic industries, wire (3) ______refers to the work performed to the end of a wire that allows it to connect to a device. It comes into two methods: crimp termination and solder termination. A (4)______termination is performed when the devices require contact or terminal, while a solder termination is performed when the wire are attach (5) ______to the device.

Wire (6)______on the other hand, is the used to extend the line of a circuit. There are 6 common wire connection methods. One is (7) ______, which can be both used for wire connection and termination. Second, is the “Tape it together” that made use of (8) ______around a twisted part of insulation. Third, Solder and seal connector that is usable when you need a quick repair on broken wires. Fourth is the(9) ______wire connectors, which simply mean as pushing in the wire to the connectors as the name implies. Fifth, Dupont Connectors, which is commonly used in (10)______and Arduino. And lastly, the quick spice connector.

When working with electrical/electronic components, it is essential to observe the safety precautions all the time. For these save life, and the devices.

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What I Can Do

ACTIVITY 5

Directions: Make an essay on the importance of adhering to safety protocols when dealing with electrical components. You will be graded through a rubric below. Write your answer on a clean sheet of paper.

Rubrics

Criteria Percentage

Content 65%

Grammar 15%

Use of punctuation marks 15%

Legibility 5%

ACTIVITY 6

Directions: Make a simple circuit diagram on any using the schematic symbols taking into consideration the basic part of a simple circuit. Write and draw your answer on a clean sheet of paper. Your output will be grade using the rubric below.

Criteria Percentage Completeness of the parts of a circuit 30% Correct use of Schematic symbols 20% Correctness of the flow 40% Legibility 10%

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Assessment

Directions: Read and understand each question and encircle the letter of the correct answer.

1. What part of a simple circuit controls the flow of current from the source to the consuming devices? a. Source b. Protecting c. Controlling d. Connecting

2. Switches belong to what part of a circuit? a. Source b. Protecting c. Controlling d. Connecting

3. Which of the following is NOT a requirement for electrical connections? a. Right wire b. Right terminal fitting c. Right tool d. Right time

4. In designing a circuit, what will be the last thing you need to do? a. Prepare tools and materials. b. Test the designed circuit. c. Make a circuit plan. d. Check the required parts.

5. What method of wire termination requires a contact or terminal? a. Crimp b. Solder c. Tape it together d. Dupont connector

6. What might happen of the applied voltage is incorrect? a. Lead to damage b. Lead to a successful task

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c. Finish task on time d. All of the above

7. What will happen to the device if connectors are removed while the power is still on? a. Nothing will happen. b. Malfunction of device. c. Automatic shutdown d. None of the above

8. What wire connection method is commonly used on electronic components? a. Quick splice connector b. Soldering c. Tape it together d. Dupont connector

9. The tape in together method in wire connection uses ______to connect two wires together. a. Plastic tape b. Electrical Tape c. Double sided tape d. Masking tape

10. A bulb is an example of what part of a circuit? a. Source b. Protecting c. Consuming d. Connecting

11. In soldering, what is the proper way of melting the iron? a. Touch the hot tip of the soldering gun to the iron. b. Push the hot tip of the soldering gun to the iron. c. Pour the hot tip of the soldering gun to the iron. d. Cutthe hot tip of the soldering gun to the iron.

12. Which of the following electronic components is NOT used in wire termination? a. Switch b. Connector c. Terminal d. Transistor

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13. Which of the following electrical quantity is considered as electrical path? a. Switch b. Wire/cable c. LED d. Battery

14. Which of the following is NOT appropriate to do when dealing with electrical components? a. Keep any electrical components cover closed. b. Make sure to turn off the power. c. Touch the terminals while the power is on. d. Apply correct voltage to the terminal.

15. You are task to make a circuit in turning on the computer system. Which of the following preparations should be done first? a. Test the circuit. b. Check the voltage of electrical sources. c. Study schematic symbols. d. Get all tools and materials needed ready.

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Answer Key

ACTIVITY 1 ACTIVITY 2 ACTIVITY 3 ACTIVITY 4

Answers vary

ACTIVITY 5 ACTIVITY 6 ASSESSMENT

Answers vary Answers vary

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REFERENCES:

1. K TO 12 Basic Education Curriculum Technology and Livelihood Education Learning Module by Ronaldo V. Ramilo, Deover M. Pasco, et.al. 2. https://hobbyhoarder.net/how-to-connect-small-wires/ 3. http://anyflip.com/stuha/varp/basic 4. http://www.ia.omron.com/product/cautions/46/safety_precaution s.html

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