Elenco Burglar Alarm User Manual
BURGLAR ALARM KIT
MODEL K-23
Assembly and Instruction Manual
Copyright © 2013, 1989 ELENCO®Electronics, Inc. Revised 2011 REV-Q 753223
No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.
ELENCO
®
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®(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.
RESISTORS
Qty. Symbol Value Color Code Part #
! 2 R1, R2 39kΩ 5% 1/4W orange-white-orange-gold 153900
CAPACITORS
Qty. Symbol Value Description Part #
! 1 C2 0.1µF (104) Mylar 251017
! 1 C1 47µF Electrolytic 274744
SEMICONDUCTORS
Qty. Symbol Value Description Part #
! 2 D1, D2 1N4001 Diode 314001
! 1 SCR1 C106B1 or T106B1 SCR 319106
MISCELLANEOUS
Qty. Symbol Description Part #
! 1 PC board 518023
! 1 S1 Switch 541102
! 1 B1 Battery snap 590098
! 1 A1 Buzzer 595203
! 1 4” Black wire 814120
! 5 4” Blue wire 814620
-1-
Resistor
Capacitor
PARTS IDENTIFICATION
Electrolytic
SCR
Switch
Diode
Mylar
Battery Snap
Buzzer
OR
The Elenco®Burglar Alarm is designed to operate
from 9-15VDC. The silicon controlled rectifier is the
heart of the Burglar Alarm. This device is an
electronic switch that allows current to flow only in
one direction. Figure 1 shows a simple circuit of an
SCR. When a positive voltage is applied to the
anode and a negative voltage to the cathode, no
current will flow.
INTRODUCTION
-2-
Figure 1
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. Some capacitors may have their value printed in
the following manner.
Second Digit
First Digit
Multiplier
Tolerance
The above value is 10 x 1,000 = 10,000pF or .01µF
The letter K indicates a tolerance of +10%
The letter J indicates a tolerance of +5%
For the No. 0 1 2 3 4 5 8 9
Multiply By 1 10 100 1k 10k 100k .01 0.1
Multiplier
Note: The letter “R” may be used at times to
signify a decimal point; as in 3R3 = 3.3
IDENTIFYING RESISTOR VALUES
Use the following information as a guide in properly identifying the value of resistors.
BAND 1
1st Digit
Color Digit
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Gray 8
White 9
BAND 2
2nd Digit
Color Digit
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Gray 8
White 9
Multiplier
Color Multiplier
Black 1
Brown 10
Red 100
Orange 1,000
Yellow 10,000
Green 100,000
Blue 1,000,000
Silver 0.01
Gold 0.1
Resistance
Toler ance
Color Tolerance
Silver +10%
Gold +5%
Brown +1%
Red +2%
Orange +3%
Green +.5%
Blue +.25%
Violet +.1%
Bands
1 2
Multiplier
Tolerance
103K
100
The Elenco®Burglar Alarm is designed to set off an
alarm whenever the circuit is activated. There are
two ways of activating the alarm; by opening a
contact switch and/or by shorting a contact switch.
Once the alarm is ON, returning the switch back to
its original position will not turn off the alarm. A third
switch controls the turn-off of the alarm. There is no
limit to the number of the switches that can be
placed to protect your property. You may use one for
each window and door in your house. There also is
a feature that allows use of the alarm to protect your
automobile and auto accessories.
POWER SUPPLY
Electrolytic capacitors have a positive and a negative
electrode. The negative lead is indicated on the
packaging by a stripe with minus signs and possibly
arrowheads. Also, the negative lead of a radial
electrolytic is shorter than the positive one.
Polarity
marking
(+)
(–)
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