ONE BUTTON BANDIT KIT
MODEL K-34
Assembly and Instruction Manual
Elenco™ Electronics, Inc.
Copyright © 1989 Elenco™ Electronics, Inc. Revised 2002 REV-D 753234
PARTS LIST
If you are a student, and any parts are missing or damaged, please see instructor or bookstore.
If you purchased this One Button Bandit 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 Value Color Code Part #
3 R1, R3, R5 220W 5% 1/4W red-red-brown-gold 132200
1 R10 1kW 5% 1/4W brown-black-red-gold 141000
1 R8 18kW 5% 1/4W brown-gray-orange-gold 151800
4 R2, R4, R6, R7 100kW 5% 1/4W brown-black-yellow-gold 161000
2 R9, R13 1MW 5% 1/4W brown-black-green-gold 171000
1 R12 2.2MW 5% 1/4W red-red-green-gold 172200
1 R11 4.7MW 5% 1/4W yellow-violet-green-gold 174700
CAPACITORS
Qty. Symbol Value Description Part #
1 C2 .1mF (104) Discap 251010
4 C1, C4, C5, C6 1mF Electrolytic 261047
1 C3 4.7mF Electrolytic 264747
SEMICONDUCTORS
Qty. Symbol Value Description Part #
9 D16 - D24 1N4148 Diode 314148
3 U1, U2, U3 4017 Integrated Circuit 334017
1 U4 MC14584 or CD40106 Integrated Circuit 334584
12 D2-5, D7-10, D12-15 LED Red 350002
3 D1, D6, D11 LED Green 350010
MISCELLANEOUS
Qty. Description Part #
1 PC Board 518034
1 Push Button Switch (S2) 540101
1 Slide Switch (S1) 541022
1 Battery Holder 590096
1 Buzzer Piezoelectric (BZ) 595201
4 Plastic Spacer 624112
3 Screw 2-56 x 5/16” 641231
4 Screw 2-56 x 3/4” 641233
PARTS IDENTIFICATION
Resistor
Diode
Battery Holder
Capacitors
Electrolytic
Screws and Nut
2-56 x 3/4”
Discap
2-56 x 5/16”
Shown actual size.
Qty. Description Part #
7 Nut 2-56 Hex 644201
7 Flat Washer 645600
1 14-pin Socket (U4) 664014
3 16-pin Socket (U1, U2, U3) 664016
1 Cover Sheet 750915B
1 Wire 22 Black Solid 8” 814120
1 Solder Tube 9ST4
Integrated Circuit
IC Socket
LED
Spacer
Flat Washer
2-56
Switches
Slide
Push Button
Buzzer
-1-
IDENTIFYING RESISTOR VALUES
Use the following information as a guide in properly identifying the value of resistors.
Bands
1 2
Multiplier
Tolerance
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
Tolerance
Color Tolerance
Silver +
Gold +5%
Brown +1%
Red +
Orange +3%
Green +.5%
Blue +
Violet +.1%
10%
2%
.25%
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.
Second Digit
First Digit
103K
100
Multiplier
Tolerance
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 above value is 10 x 1,000 = 10,000pF or .01mF The letter K indicates a tolerance of +10% The letter J indicates a tolerance of +5%
INTRODUCTION
The One Button Bandit is better known in Las Vegas
as the One Arm Bandit. Our device has no arms,
but instead a button. Therefore, we call it the One
Button Bandit.
The One Button Bandit is a simplified version of an
electronic slot machine. It contains three columns of
THEORY OF OPERATION
Figure 1 shows the block diagram of the One Button
Bandit. This block diagram consists of three
identical circuits: (the basic has a timer, a decade
counter, and five LEDs), the Clock Oscillator, the
Sound Circuit and the Key of Ring.
five light emitting diodes (LED). When the switch S2
is pressed, the LEDs will flash on and off
accompanied by sound. When the bandit stops,
only one LED in each column will remain lit. If three
green LEDs light up, you win the jackpot
accompanied by sound.
1
LEDs
2
LEDs
Clock
Timer
Counter
Timer
Counter
Figure 1
Timer
3
Key
Ring
Sound
Circuit
-2-
Counter
LEDs
THE CLOCK OSCILLATOR
The clock oscillator is an electronic circuit that puts
out a series of high and low voltages. It is a square
wave oscillator whose frequency is controlled by the
value of resistor and capacitor (see Figure 2a). The
clock oscillator consists of Part A of the MC14584
integrated circuit. Figure 2b shows a diagram of the
MC14584.
The MC14584 is a hex schmit trigger. The values of
R7 and C1 chosen give a frequency of about 30
cycles per second. When the switch S1 is turned
ON, the clock circuit oscillates pulses. The pulses
will be before switch S1 is in the “ON” position. They
go to the clock input of decade counters U1, U2 and
U3 pin 14.
pulse will move the output one position. Connect an
LED to the output, it will light only when the output
goes high. It is obvious that when the clock is
running, the LEDs will flash on and off with the
speed of the clock. When the clock stops, only one
LED will be lit.
In this design, 5 LEDs are used per IC, but the
counter has 10 outputs. If the clock stops at an
output without an LED, nothing will light. To prevent
this, the 4017 IC is reset after hitting the 5th output.
This is simply done by tying the 6th output to the
clear pin (pin 1 and pin 15 shorted together). When
the clock triggers output 5 on, the next pulse goes
back to output 1.
A
2
B
4
C
6
D
8
E
10
F
12
R
C
Figure 2a
1
3
5
9
11
13
Figure 2b
THE DECADE COUNTER
The 4017 IC is a 5 stage divide by 10 counter.
Figure 3 shows a diagram of this IC.
14
15
Clock
1
Clock
Enable
Reset
C
VCC - Pin 16
GND - Pin 8
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
OUT
3
2
4
7
10
1
5
6
9
11
12
Figure 3
This IC has 10 outputs and a clear input. Only one
of the 10 outputs will be high at any given time. The
other 9 will be low. Let’s assume that output 1 is
high. If a pulse is fed into the clock input, output 1
will go low and output 2 will go high. Each clock
THE TIMER
The One Button Bandit has three timers. The timers
start when you turn ON the push button switch. The
timers consist of Part D of the MC14584, R13 and
C6; Part E and R12, C5; Part F and R11, C4. The
values of the resistors and capacitors give the times
of work for each decade counter.
THE LIGHT EMITTING DIODES (LED)
The operation of the LED is very simple. When
current flows through the LED, it will emit light. Note
that the LED is connected between an IC output and
ground through a resistor. When the IC output goes
high, the LED will light. The resistor limits the current
so that the LED will not be damaged.
THE SOUND CIRCUIT
This circuit consists of the buzzer’s oscillator and the
piezoelectric buzzer. The oscillator consists of Part
B of the MC14584 integrated circuit. The value of
resistor R8 and capacitor C2 chosen given a
frequency of about 3000 cycles per second. This
oscillator oscillates pulses only when the decade
counters work. The pulses from this oscillator go to
the buzzer. It is accompanied by sound when the
bandit works.
THE KEY OF RING
When the One Button Bandit stops and the three
green LEDs light, you will get the ring signal. This
sound signal will be before you push the switch S2
again. The Key of Ring is an oscillator and consists
of Part C of the MC14584. The values of resistor R9
and capacitor C3 give the frequency of ring sound.
-3-
CONSTRUCTION
Introduction
The most important factor in assembling your K-34 One Arm Bandit Kit is good soldering techniques. Using the
proper soldering iron is of prime importance. A small pencil type soldering iron of 25 - 40 watts is
recommended. The tip of the iron must be kept clean at all times and well tinned.
Safety Procedures
• Wear eye protection when soldering.
Locate soldering iron in an area where you do not have to go around it or reach over it.
•
• Do not hold solder in your mouth. Solder contains lead and is a toxic substance. Wash your hands
thoroughly after handling solder.
• Be sure that there is adequate ventilation present.
Assemble Components
In all of the following assembly steps, the components must be installed on the top side of the PC board unless
otherwise indicated. The top legend shows where each component goes. The leads pass through the
corresponding holes in the board and are soldered on the foil side.
Use only rosin core solder of 63/37 alloy.
DO NOT USE ACID CORE SOLDER!
What Good Soldering Looks Like
A good solder connection should be bright, shiny,
smooth, and uniformly flowed over all surfaces.
1. Solder all components from
the copper foil side only.
Push the soldering iron tip
against both the lead and
the circuit board foil.
2. Apply a small amount of
solder to the iron tip. This
allows the heat to leave the
iron and onto the foil.
Immediately apply solder to
the opposite side of the
connection, away from the
iron. Allow the heated
component and the circuit
foil to melt the solder.
3. Allow the solder to flow
around the connection.
Then, remove the solder
and the iron and let the
connection cool. The
solder should have flowed
smoothly and not lump
around the wire lead.
4.
Here is what a good solder
connection looks like.
Component Lead
Foil
Solder
Foil
Solder
Foil
Soldering Iron
Circuit Board
Soldering Iron
Soldering Iron
Types of Poor Soldering Connections
1. Insufficient heat - the
solder will not flow onto the
lead as shown.
2. Insufficient solder - let the
solder flow over the
connection until it is
covered. Use just enough
solder to cover the
connection.
3. Excessive solder - could
make connections that you
did not intend to between
adjacent foil areas or
terminals.
4. Solder bridges - occur
when solder runs between
circuit paths and creates a
short circuit. This is usually
caused by using too much
solder. To correct this,
simply drag your soldering
iron across the solder
bridge as shown.
Rosin
Soldering iron positioned
incorrectly.
Solder
Component Lead
Solder
Soldering Iron
Foil
Gap
Drag
-4-
ASSEMBLE COMPONENTS TO THE PC BOARD
C5 - 1mF Electrolytic Cap.
(see Figure A)
U3 - 16-pin IC Socket
U3 - 4017 Integrated Circuit
(see Figure B)
J4 - Jumper Wire
(see Figure C)
R11 - 4.7MW 5% 1/4W Resistor
(yellow-violet-green-gold)
C4 - 1mF Electrolytic Cap.
(see Figure A)
R5 - 220W 5% 1/4W Resistor
(red-red-brown-gold)
J3 - Jumper Wire
(see Figure C)
J2 - Jumper Wire
(see Figure C)
R6 - 100kW 5% 1/4W Resistor
(brown-black-yellow-gold)
C1 - 1mF Electrolytic Cap.
(see Figure A)
U2 - 16-pin IC Socket
U2 - 4017 Integrated Circuit
(see Figure B)
R3 - 220W 5% 1/4W Resistor
(red-red-brown-gold)
R4 - 100kW 5% 1/4W Resistor
(brown-black-yellow-gold)
D19 - 1N4148 Diode
D18 - 1N4148 Diode
D16 - 1N4148 Diode
(see Figure D)
R2 - 100kW 5% 1/4W Resistor
(brown-black-yellow-gold)
U1 - 16-pin IC Socket
U1 - 4017 Integrated Circuit
(see Figure B)
R1 - 220W 5% 1/4W Resistor
(red-red-brown-gold)
Figure A
Electrolytic capacitors have polarity. Be sure
to mount them with the negative (–) lead
(marked on side) in the correct hole. Mount
the electrolytics horizontal to the PC board.
Bend the leads at right angles and then
insert the leads into the PC board.
Polarity Marking
D22 - 1N4148 Diode
(see Figure D)
S2 - Push Button Switch
R12 - 2.2MW 5% 1/4W Resistor
(red-red-green-gold)
D23 - 1N4148 Diode
(see Figure D)
R13 - 1MW 5% 1/4W Resistor
(brown-black-green-gold)
D24 - 1N4148 Diode
(see Figure D)
C6 - 1mF Electrolytic Cap.
(see Figure A)
U4 - 14-pin IC Socket
U4 - MC14584 or CD40106 IC
(see Figure B)
R7 - 100kW 5% 1/4W Resistor
(brown-black-yellow-gold)
D17 - 1N4148 Diode
(see Figure D)
R10 - 1kW 5% 1/4W Resistor
(brown-black-red-gold)
D21 - 1N4148 Diode
(see Figure D)
R9 - 1MW 5% 1/4W Resistor
(brown-black-green-gold)
D20 - 1N4148 Diode
(see Figure D)
R8 - 18kW 5% 1/4W Resistor
(brown-gray-orange-gold)
C2 - .1mF Discap (104)
C3 - 4.7mF Electrolytic Cap.
(see Figure A)
S1 - Slide Switch
J1 - Jumper Wire
(see Figure C)
Figure B
Insert the IC socket into the PC board with
the notch in the direction shown on the top
legend. Solder the IC socket into place.
Insert the IC into the socket with the notch
in the same direction as the notch on the
socket.
Notch
-5-
ASSEMBLE COMPONENTS TO THE PC BOARD
Figure C
Form a discarded piece of an
electrolytic lead into a jumper wire by
bending the wire to the correct length
and mount it to the PC board.
Figure D
Diodes have polarity. Mount them
with the band in the correct direction,
as shown on the PC board.
Band
Figure E
Mount the LED flush
onto the PC board
with the flat side of
the LED in the same
direction as marked
on the PC board.
Flat
D15 - Red LED
D14 - Red LED
D13 - Red LED
D12 - Red LED
D11 - Green LED
(see Figure E)
D10 - Red LED
D9 - Red LED
D8 - Red LED
D7 - Red LED
D6 - Green LED
(see Figure E)
D5 - Red LED
D4 - Red LED
D3 - Red LED
D2 - Red LED
D1 - Green LED
(see Figure E)
BZ - Buzzer
Battery Holder
(see Figure F)
Mount the battery holder and the buzzer to the
PC board using three 2-56 x 5/16” screws, three
2-56 nuts, and three flat washers (as shown
below). Note: Use a piece of Scotch Tape on
the brass part of the buzzer only to hold it in
place. Cut two 1” pieces of wire and strip 1/4” of
insulation off of both ends. Solder the first wire
from the positive (+) battery holder lead to the
2-56 Hex Nut
Flat Washer
Tape
Battery Holder
2-56 x 5/16”
Screw
Figure F
+BATT point on the PC board. Solder the
second wire from the negative (–) battery holder
lead to the –BATT point on the PC board. Cut
off the excess leads. Use an excess lead to
form a jumper wire. Bend the wire as shown
below and solder this jumper from the outer
edge of the buzzer to the –BZ point on the PC
board. Next, cut a 1.5” piece of wire and strip
2-56 Hex Nut
0.2”
Flat Washer
Buzzer
Buzzer
PC Board
2-56 x 5/16”
Screw
Jumper Wire
Jumper Wire
1” Black Wires
1/4” of insulation off of both ends.. Solder this
wire from the +BZ point on the PC board to the
middle of the buzzer. Note: Do not let the flat
washers touch the silver part of the buzzer or let
the solder from the wire from the outer edge
touch the silver part.
Jumper Wire
1.5” Black Wire
-6-
Put the 9V alkaline battery into the battery holder.
Slide the switch to the ON (top) position and push
on the button switch. The LEDs will flash ON and
OFF accompanied by sound. If it is OK, go to the
Final Assembly.
TROUBLESHOOTING
Contact Elenco™ Electronics if you have any problems. DO NOT contact your place of purchase as they will
not be able to help you.
1. One of the most frequently occurring problems is
poor solder connections.
2. Be sure that all components have been mounted
in their correct places.
a) Tug slightly on all parts to make sure that
they are indeed soldered.
b) All solder connections should be shiny.
Resolder any that are not.
c) Solder should flow into a smooth puddle
rather than a round ball. Resolder any
connection that has formed into a ball.
d) Have any solder bridges formed? A solder
bridge may occur if you accidentally touch
an adjacent foil by using too much solder or
by dragging the soldering iron across
adjacent foils. Break the bridge with your
soldering iron.
a) Be sure that diodes D16 - D24 have not
been installed backwards. The band on the
diodes should be in the same direction as
marked on the PC board.
b) Are electrolytics C1, C3 - C6 installed
correctly? These capacitors have polarity.
Be sure that the negative lead is in the
correct pad.
c) Be sure that the ICs are installed correctly.
The notch should be in the same direction
as shown on the top legend of the PC board.
d) Be sure that the LED has been installed
correctly. The flat side of the LED should be
in the same direction as marked on the top
legend of the PC board.
FINAL ASSEMBLY
1. Using a small knife or scissors, very carefully cut out the holes on the cover sheet as shown in Figure G.
ONE BUTTON BANDIT
ONE BUTTON BANDIT
Cut Out
Cut Out Cut Out
ON
Copyright © 1998 Elenco Electronics, Inc.
3/16” x 5/16”
Electronic Slot Machine
Electronic Slot Machine
Cut Out
5/16” x 5/16”
Wager Back for Any 2 Green Lights
Figure G
-7-
50-1
25-1
15-1
Cut Out
10-1
5-1
PUSH
3/32” Diameter
2. Next, cut out the holes on the clam shell as
shown in Figure H. To do this, you’re going to
have to position the cover sheet inside the
clamshell to where you want it mounted. Tape
ONE BUTTON BANDIT
ONE BUTTON BANDIT
Cut Out
the sheet to the clam shell as shown. Now cut
out the four corner holes, the ON/OFF Switch
hole, and the Push Button Switch hole. Remove
the tape.
Tape
50-1
25-1
15-1
10-1
5-1
Cut Out
ON
Electronic Slot Machine
Electronic Slot Machine
Copyright © 1998 Elenco Electronics, Inc.
3.
Insert the four 2-56 x 3/4” screws and four
washers into the holes of the clamshell and
cover sheet as shown in Figure I. Next, slide on
the four plastic spacers onto the 2-56 x 3/4”
Wager Back for Any 2 Green Lights
Tape
Figure H
screws as shown in Figure J. Now slide the PC
board onto the screws as shown.
everything into place by threading on the four 2-56
hex nuts onto the screws as shown in Figure J.
PUSH
Cut Out
Finally, lock
Figure I
Flat Washers
2-56 x 3/4” Screws
Flat Washers
2-56 x 3/4” Screws
-8-
FINAL ASSEMBLY (CONTINUED)
PC Board
Figure J
2-56 Nuts
2-56 Nuts
Plastic Spacers
Plastic Spacers
QUIZ
1. In electronics, a capacitor is a . . .
a) counter. c) light emitting diode.
b) generator.d) storage device.
2. LED means . . .
a) light emitting device. c) long electronic delay.
b) light emitting diode. d) light electric diode.
3. The clock oscillator generates a . . .
a) sound pulses. c) periodic waveform.
b) DC voltage. d) light pulses.
4. The decade counter is triggered by . . .
a) the timer. c) LEDs.
b) the sound circuit. d) the clock oscillator.
5. The key of ring gives the sound ring signal when . . .
Cover Sheet
a) the three green LEDs light.
b) any three LEDs light.
c) three LEDs light up in a row.
6. The buzzer transforms . . .
a) electrical signals to light.
b) electrical signals to sound.
c) light to electrical signals.
7. The probability of winning any green LED is . . .
a) 4% c) 60%
b) 25% d) 0.8%
8. The probability of winning three green LEDs is . . .
a) 4% c) 20%
b) 25% d) 0.8%
Answers: 1. D; 2. B; 3. C; 4. D; 5. A; 6. B; 7. C; 8. D
-9-
SCHEMATIC DIAGRAM
-10-
Elenco Electronics, Inc.
150 W. Carpenter Avenue
Wheeling, IL 60090
(847) 541-3800
http://www.elenco.com
e-mail: elenco@elenco.com
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