Elenco Electronics K-24 Assembly And Instruction Manual
WHOOPER ALARM KIT
MODEL K-24
Assembly and Instruction Manual
Elenco Electronics, Inc.
Copyright © 1989 Elenco Electronics, Inc. Revised 2002 REV-D 753224
PARTS LIST
If you are a student, and any parts are missing or damaged, please see instructor or bookstore.
If you purchased this whooper alarm kit from a distributor, catalog, etc., please contact Elenco Electronics
(address/phone/e-mail is at the back of this manual) for additional assistance, if needed.
RESISTORS
Qty. Symbol Description Color Code Part #
1 R8 100W 5% 1/4W brown-black-brown-gold 131000
2 R3, R6 1kW 5% 1/4W brown-black-red-gold 141000
1 R2 2.2kW 5% 1/4W red-red-red-gold 142200
1 R5 6.8kW 5% 1/4W blue-gray-red-gold 146800
2 R1, R9 15kW 5% 1/4W brown-green-orange-gold 151500
1 R4 22kW 5% 1/4W red-red-orange-gold 152200
1 R7 27kW 5% 1/4W red-violet-orange-gold 152700
CAPACITORS
Qty. Symbol Value Description Part #
2 C2, C3 .047mF (473) Discap 244780
2 C1, C4 100mF Electrolytic 281044
SEMICONDUCTORS
Qty. Symbol Value Description Part #
3 Q1, Q3, Q4 2N3904 Transistor 323904
1 Q2 2N3906 Transistor 323906
1 Q5 MPS6531 Transistor 326531
MISCELLANEOUS
Qty. Symbol Description Part #
1 PC Board 518024
1 S1 Switch Slide SPDT 541102
1 Solder Roll 24” 551124
1 B1 Battery Snap 9V 590098
1 SPK1 Speaker 8W 590102
2 Wire 4” Blue 814620
PARTS IDENTIFICATION
Resistor Transistor
Battery Snap
Capacitors
Discap
Electrolytic
Speaker
Switch
-1-
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
2 Multiplier Tolerance
1
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
BANDS
Resistance
Tolerance
Color Tolerance
Silver +10%
Gold +
Brown +1%
Red +2%
Orange +
Green +.5%
Blue +.25%
Violet +
5%
3%
.1%
IDENTIFYING CAPACITOR VALUES
Capacitors will be identified by their capacitance value in pF (picofarads), nF (nanofarads), or mF (microfarads). Most
capacitors will have their actual value printed on them. Some capacitors may have their value printed in the following
manner. The maximum operating voltage may also be printed on the capacitor.
Multiplier
10mF 16V
For the No.01234589
Multiply By 1 10 100 1k 10k 100k .01 0.1
Note: The letter “R” may be used at times
to signify a decimal point; as in 3R3 = 3.3
The letter M indicates a tolerance of +
The letter K indicates a tolerance of +10%
The letter J indicates a tolerance of +5%
103K
100V
First Digit
Second Digit
Multiplier
Tolerance
Maximum Working Voltage
20%
The value is 10 x 1,000 = 10,000pF or .01mF 100V
METRIC UNITS AND CONVERSIONS
Abbreviation Means Multiply Unit By Or
p Pico .000000000001 10
n nano .000000001 10
m micro .000001 10
m milli .001 10
– unit 1 10
k kilo 1,000 10
M mega 1,000,000 10
-12
-9
-6
-3
0
3
6
-2-
1. 1,000 pico units = 1 nano unit
2. 1,000 nano units = 1 micro unit
3. 1,000 micro units= 1 milli unit
4. 1,000 milli units = 1 unit
5. 1,000 units = 1 kilo unit
6. 1,000 kilo units= 1 mega unit
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