Elenco Electronics K-11 Assembly And Instruction Manual
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Elenco Electronics K-11 Assembly And Instruction Manual

Ac/dc power supply kit
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AC/DC POWER SUPPLY KIT
MODEL K-11
Assembly and Instruction Manual
Elenco
®
Electronics, Inc.
Copyright © 2004, 1989 by Elenco
®
Electronics, Inc. All rights reserved.
Revised 2004
REV-J
753211
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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Summary of Contents for Elenco Electronics K-11

  • Page 1 AC/DC POWER SUPPLY KIT MODEL K-11 Assembly and Instruction Manual Elenco ® Electronics, Inc. Copyright © 2004, 1989 by Elenco ® Electronics, Inc. All rights reserved. Revised 2004 REV-J 753211 No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

  • Page 2: Parts List

    If you are a student, and any parts are missing or damaged, please see instructor or bookstore. If you purchased this AC/DC power supply 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. DO NOT contact your place of purchase as they will not be able to help you.

  • Page 3: Theory Of Operation

    INTRODUCTION The electrical power that is supplied by your power company is what is known as Alternating Current or AC. This current is constantly changing amplitude and polarity (see Figure 1). The electrons (current) move back and forth at a rate of 60 times per second. This type of current is not suitable for most electronic circuits.

  • Page 4: Reference Voltage

    FILTERING Filtering is the process of smoothing hills produced by the full wave rectifiers. The circuit consists of the 1000µF capacitor C1. capacitor is an electrical device that stores electrical energy. If two metal plates are placed very close to each other and are connected to a battery, a current will flow momentarily, even...
  • Page 5 CONSTRUCTION Introduction The most important factor in assembling your K-11 Power Supply Kit is good soldering techniques. Using the proper soldering iron is of prime importance. recommended. The tip of the iron must be kept clean at all times and well tinned.
  • Page 6 ASSEMBLE COMPONENTS TO THE PC BOARD T1 - Transformer, two 6-32 x 5/16” Screws, two 6-32 Nuts, Shrink Tubing, Cable Clamp, & Line Cord Cut the shrink tubing into two 1” sections. Slip a section of tubing onto each of the two lead wires on the line cord.

  • Page 7: Operating Procedure

    OPERATING PROCEDURE To operate the K-11 Power Supply, plug the line cord into a 120V, 60Hz AC outlet, turn the switch (S1) to the ON position and rotate the potentiometer (R2) to make the output voltage climb from 0 to 15 volts DC. The red wire from P1 is the positive output, the blue wire from P2 is the negative DC output, and the two yellow wires are the AC output - 8.5V without regulation.
  • Page 8 QUIZ Mark the box next to the letter with the correct answer. 1. AC voltage is supplied to the rectifier stages by the . . . A. step-up transformer. B. step-down transformer. C. 1-to-1 transformer. D. AC-to-DC transformer. 2. The secondary windings of the transformer are . . . A.

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