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SOLDER PRACTICE KIT
MODEL AK-100 / SP-1A
Assembly and Instruction Manual
Elenco
®
Electronics, Inc.
Copyright © 2004, 1994 by Elenco
®
Electronics, Inc. All rights reserved.
Revised 2004
REV-I
752601
No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.
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Related Manuals for Elenco Electronics AK-100/SP-1A
Summary of Contents for Elenco Electronics AK-100/SP-1A
- Page 1 SOLDER PRACTICE KIT MODEL AK-100 / SP-1A Assembly and Instruction Manual Elenco ® Electronics, Inc. Copyright © 2004, 1994 by Elenco ® Electronics, Inc. All rights reserved. Revised 2004 REV-I 752601 No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.
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Page 2: Parts List
PARTS LIST If you are a student, and any parts are missing or damaged, please see instructor or bookstore. If you purchased this kit from a distributor, catalog, etc., please contact Elenco mail is at the back of this manual) for additional assistance, if needed. DO NOT contact your place of purchase as they will not be able to help you. - Page 3 IDENTIFYING RESISTOR VALUES Use the following information as a guide in properly identifying the value of resistors. BAND 1 1st Digit Color Digit Black Brown Orange Yellow Green Blue Violet Gray White IDENTIFYING CAPACITOR VALUES Capacitors will be identified by their capacitance value in pF (picofarads), nF (nanofarads), or μF (microfarads). Most capacitors will have their actual value printed on them.
- Page 4 RESISTOR READING EXERCISE Before starting assembly of your solder practice project, you should be thoroughly familiar with the 4-band color code system. Many of the resistor values will be identified by color bands and it is easy to mistake their value if you read the colors incorrectly or read the value from the wrong end.
- Page 5 INTRODUCTION Almost every electronic device today has a printed circuit board. Whether you are assembling a PC board or repairing it, you must understand the basics of working with these boards. Good soldering requires understanding of soldering principles. This solder practice project will help you achieve good soldering techniques, help you to become familiar with a variety of electronic components, and provide you...
- Page 6 Types of Soldering Devices A number of different types of soldering devices: irons, guns and stations are available today. Irons are used for light to medium work and guns are for medium to heavy-duty work. The station type can range from light to heavy-duty For working on PC boards, irons ranging from 15 to 40 watts are suitable, or a station with a range of 15 to 40 watts.
- Page 7 SOLDER PRACTICE Double Pads Before we begin to assemble and solder the components to the solder practice PC board, we will start first by practice soldering to the double pads on the edge of the PC board (see Figure 3). 1.
- Page 8 PC BOARD REPAIR Hairline Cracks The hairline cracks can develop in the copper foil if the PC board is flexed. This can be easily repaired by making a solder bridge across the two foils. The solder should smoothly flow across the foil as shown in Figure 8.
- Page 9 REMOVING EXCESS SOLDER USING SOLDER WICK Desoldering wick is a braided wire coated with non- corrosive rosin flux. It is the simplest and safest tool for removing solder from a solder connection. When the braided wire is heated, the flux cleans and breaks up the surface tension so the melted solder Using the Solder Wick Place the solder wick on one of the pads and the...
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Page 10: Theory Of Operation
THEORY OF OPERATION The solder practice kit consists of a circuit oscillating at one hertz (one cycle per second). The oscillator consists of two transistors Q1 and Q2, and resistors, R1 - R11 and capacitors C1 and C2. configuration is known as a multivibrator circuit. - Page 11 SOLDERING A poorly soldered joint can greatly affect small current flow in circuits and can cause equipment failure. You can damage a PC board or a component with too much heat or cause a cold solder joint with insufficient heat. Sloppy soldering can cause bridges between two adjacent foils preventing the circuit from functioning.
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Page 12: Pc Board Assembly
PC BOARD ASSEMBLY NOTE: Before beginning assembly, please refer to page 13 for the resistor reading exercise. This will familiarize you with the resistor color band coding. Solder the following parts to the PC board. Battery Snap (see Figure A) C5 - .02μF or .022μF Discap C6 - 100μF Electrolytic (Lytic) (see Figure B) -
Page 13: Operation
PC BOARD ASSEMBLY (continued) Solder the following parts to the PC board. R3 - 68Ω 5% ¼W Resistor (blue-gray-black-gold) (see Figure E) R2 - 1kΩ 5% ½W Resistor (brown-black-red-gold) (see Figure E) C2 - 10μF Electrolytic (Lytic) (see Figure B) Q1 - 2N3904 Transistor Q2 - 2N3904 Transistor (see Figure G) -
Page 14: Troubleshooting
TROUBLESHOOTING If any parts are missing or damaged, see instructor or bookstore. DO NOT contact your place of purchase as they will not be able to help you. Contact Elenco Electronics (address/phone/e-mail ® is at the back of this manual). If you are experiencing a problem, first read the theory of operation to familiarize yourself with the operation. -
Page 15: Word Glossary
WORD GLOSSARY Capacitor An electrical component that can store electrical pressure (voltage) for periods of time. Cold Solder Joint Occurs because insufficient heat was applied or the connection was moved before the solder had set. Connection looks crystalline, crumbly, or dull. Flux A substance that is used to cleanse the surface of oxide... - Page 16 QUIZ 1. Solder is comprised of what two materials? A. Gold and copper B. Tin and lead C. Zinc and copper D. Lead and aluminum 2. What type of flux should be used in electronics? A. Chloride B. Organic C. Rosin D.