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SOLDER PRACTICE KIT
MODEL SP-3B
Assembly and Instruction Manual
Elenco
®
Electronics, Inc.
Copyright © 2005, 2001 by Elenco
®
Electronics, Inc. All rights reserved.
Revised 2005
REV-F
753000
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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Table of Contents
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Summary of Contents for Elenco Electronics SP-3B
- Page 1 SOLDER PRACTICE KIT MODEL SP-3B Assembly and Instruction Manual Elenco ® Electronics, Inc. Copyright © 2005, 2001 by Elenco ® Electronics, Inc. All rights reserved. Revised 2005 REV-F 753000 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 Note: Please refer to the Resistor Reading Exercise on page 7 before starting assembly of your solder practice kit.
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Page 4: Safety Precautions
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 5: Tip Cleaning
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 6 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 4). 1.
- Page 7 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 9.
- Page 8 REMOVING EXCESS SOLDER USING DESOLDERING 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 from the connection flows into the braid by capillary action.
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Page 9: 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 10 SOLDERING COMPONENTS TO THE PC BOARD 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 11: Pc Board Assembly
PC BOARD ASSEMBLY Solder the following parts to the PC board. J2 - Jumper Wire (see Fig. A) J1 - Jumper Wire (see Fig. A) J5 - Jumper Wire (see Fig. A) J4 - Jumper Wire (see Fig. A) R1 - 100Ω 5% ¼W Resistor (brown-black-brown-gold) (see Figure B) R2 - 150Ω... - Page 12 PC BOARD ASSEMBLY (continued) Solder the following parts to the PC board. U1 - 16-pin IC Socket (see Figure C) R14 - 27kΩ 5% ¼W Resistor (red-violet-orange-gold) (see Figure D) R13 - 18kΩ 5% ¼W Resistor (brown-gray-orange-gold) (see Figure D) R17 - 100kΩ...
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Page 13: Operation
PC BOARD ASSEMBLY (continued) Solder the following parts to the PC board. R6 - 56kΩ 5% ¼W Resistor (green-blue-orange-gold) (see Figure B) R5 - 330Ω 5% ¼W Resistor (orange-orange-brown-gold) (see Figure B) C1 - 10µF 16V Electrolytic (see Figure E) Battery Snap (see Figure F) SW1 - Switch SPST LED1 - Red LED... -
Page 14: Troubleshooting
If you are a student, and any parts are missing or damaged, please see instructor or bookstore. If you purchased this solder practice kit from a distributor, catalog, etc., please contact Elenco (address/phone/e-mail is at the back of this manual) for additional assistance, if needed. -
Page 15: Wire Gauge
WORD GLOSSARY (continued) Resistor Component used to control the flow of electricity in a circuit. It is made of carbon. Rosin Core Solder The most common type of solder used in electronics generally referred to as 63/37 rosin core solder. Solder A tin/lead alloy that melts at a very low temperature, used to join other metals together. - Page 16 Elenco ® Electronics, Inc. 150 Carpenter Avenue Wheeling, IL 60090 (847) 541-3800 Website: www.elenco.com e-mail: elenco@elenco.com...
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