Elenco Electronics XK-700K Benutzerhandbuch
DIGITAL / ANALOG TRAINER
MODEL XK-700K
A COMPLETE MINI-LAB FOR BUILDING,TESTING
AND PROTOTYPING ANALOG AND DIGITAL CIRCUITS
Elenco Electronics, Inc.
Copyright © 1996 Elenco Electronics, Inc. Revised 2001 REV-E 753029
Tools and meter shown not included.
Assembly & Instruction Manual
-1-
PS-700-B
XK-700K POWER SUPPLY KIT (PS-700-B) PARTS LIST
RESISTORS
Qty. Symbol Value Description Part #
2 R1, R2 120Ω5% 1/4W (brown-red-brown-gold) 131200
1 VR3 1kΩPot PC MNT 192412
2 VR1, VR2 2kΩPot PC MNT 192421
1 VR4 100kΩPot PC MNT 192612
CAPACITORS
Qty. Symbol Value Description Part #
5 C6 - C10 .1µF 100V Mylar 251017
7 C11 - C17 100µF Electrolytic 281045
4 C1, C2, C4, C5 1000µF 35V Electrolytic 291096
1 C3 2200µF 25V Electrolytic 292225
SEMICONDUCTORS
Qty. Symbol Description Part #
15 D1 - D15 1N4001 Diode 314001
1 U1 LM317 Integrated Circuit 330317
1 U5 LM337 Integrated Circuit 330337
1 U3 LM7805 Integrated Circuit 337805
1 U2 LM7812 Integrated Circuit 337812
1 U4 LM7912 Integrated Circuit 337912
MISCELLANEOUS
Qty. Description Part #
1 Transformer 44K500
1 PC Board 514550
1 Fuse 1.25A 530125
1 Switch Illuminated 541204
2 Connector 3-pin 591032
1 Connector 5-pin 591052
4 Bracket L 4-40 tap 613008
1 Panel Top 614108
1 Panel Side Left 614506
1 Panel Side Right 614507
1 Panel Back 614508
4 Knob 622009
1 Case 623051
1 Strain Relief 624003
1 Spacer Nylon 7/16” x 3/16” Tap 624013
1 Connector Receptacle 626020
1 Connector Plug 626021
1
Screw 4-40 x 1/4” Phillips, Flat Head
641431
9 Screw 4-40 x 1/4” Phillips Truss 641438
6 Screw 6-32 x 5/16” Slotted 641641
2 Screw 8-32 x 3/8” Phillips 641840
2 Screw #4 x 1/4” Phillips AB 642430
4 Screw 4-40 x 1/4” Phillips Thrd Ct 642432
4 Screw #6 x 1/2 Phillips AB 642662
Qty. Description Part #
4 Screw #6 x 3/8” Phillips Thrd Ct 643652
4 Nut 7mm 644101
6 Nut 6-32 644601
2 Nut 8-32 644800
4 Washer 8mm x 14mm (Pot) 645101
4 Washer #6 Black 645400
4 Washer Fiber 645404
2 Lockwasher #8 EXT 646828
1 Fuse Holder 663000
4 Bredblox 4-pin 665204
2 Terminal Male Crimp 666010
2 Terminal Female Crimp 666011
1 Manual 753029
5 Insulator Mica 780002
5 Insulator Washer 780101
1 Silicon Grease 790004
6” Wire #20 Red Stranded 813210
2.5’ Wire #22 Bare Wire 845000
1 Line Cord 862105
2” Shrink Tubing 3/16” 890120
1” Shrink Tubing 1/4” 890701
2” Shrink Tubing 1/2” 891101
2” Shrink Tubing 3/4” 899110
1 Solder Tube 9ST4A
Screw Identification
Phillips AB Screw 4-40 / #6 Thread Cutting Screw Standard Screw
(Type 23)
Flat Head Screw Truss Head Screw
-2-
PARTS VERIFICATION
Before beginning the assembly process, first familiarize yourself with the components and this instruction book.
Verify that all parts are present. This is done best by checking off each item in the parts list.
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
Tolerance
Color Tolerance
Silver +10%
Gold +5%
Brown +1%
Red +2%
Orange +3%
Green +0.5%
Blue +0.25%
Violet +0.1%
Bands
1 2 Multiplier
Tolerance
Resistors Capacitors
Electrolytic
(Lytic)
(Radial)
Connectors
Switches
Mylar
PC Mount
Potentiometer
Rotary DPDT
Spacer
Discap
Knob
PC Mount
Trim Pot
3-Pin 4-Pin 5-Pin
Miscellaneous
Illuminated TransformerBredblox
Connector Plug Connector
Receptacle
Fuse
Assembly
Male Crimp
Terminal Female Crimp
Terminal
Integrated
Circuit (IC)
IC Socket Transistor Integrated
Circuit (IC)
Diode
LED
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. The maximum operating voltage may also be printed on the capacitor.
Second Digit
First Digit
Multiplier
Tolerance*
For the No. 01234589
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
10µF 16V
103K
100V
The letter M indicates a tolerance of +20%
The letter K indicates a tolerance of +10%
The letter J indicates a tolerance of +5%
Maximum Working Voltage
The value is 10 x 1,000 =
10,000pF or .01µF 100V
*
Semiconductors
-3-
Introduction
The most important factor in assembling your XK-700K Digital / AnalogTrainer 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!
CONSTRUCTION
Solder Soldering Iron
Foil
Solder
Soldering Iron
Foil
Component Lead
Soldering Iron
Circuit Board
Foil
Rosin
Soldering iron positioned
incorrectly.
Solder
Gap
Component Lead
Solder
Soldering Iron
Drag
Foil
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.
1. Insufficient heat - the
solder will not flow onto the
lead as shown.
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.
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.
What Good Soldering Looks Like
A good solder connection should be bright, shiny,
smooth, and uniformly flowed over all surfaces.
Types of Poor Soldering Connections
-4-
INTRODUCTION
The XK-700K Digital/Analog Trainer is divided into four separate kits: BB-700-A, PS-700-B, AN-700-C and DG-
700D. Each bag of parts is clearly identified. Open only the kit called for in your procedure. DO NOT open any
other bag at this time. The first kit is the BB-700-A which contains only the bredboard. The bredboard will be
assembled to the front panel of the trainer during the assembly of the PS-700-B Power Supply. Read your
instructions carefully.
Power Supply
The XK-700K has five built-in power supplies which will satify most design needs. This includes two variable
power supplies giving up to +20 volts and -20 volts at .5 amp. Below 15V, the current available is 1 amp. Three
fixed power supplies give you +12VDC, –12VDC or +5VDC at 1 amp each. These fixed voltages are the most
commonly used voltages for design work. All supplies are regulated to within 150mV. This means that you can
increase the current draw from no load to 0.5 amp and the voltage will change less than 150mV. All supplies
are also short circuit protected by using integrated circuit regulator devices.
Analog Trainer Section Function Generator
The analog trainer contains a complete function generator capable of producing sine, square and triangle
waveforms. The frequency of the generator is continuously variable from one hertz to over 100,000 hertz in five
steps. A fine tuning control makes the selection of any frequency easy. The output voltage amplitude is variable
between 0 to 15Vpp. The output impedance is approximately 330 ohms.
Digital Trainer Section
The digital trainer has the necessary functions to do your digital experiments. They consist of a clock generator,
two no-bounce switches, eight LED indicator lamps and eight data switches.
POWER SUPPLY SPECIFICATIONS
Power Supplies:
• +1.25V to 20VDC @ 0.5 amp (1.25V to 15V @ 1 amp).
• –1.25 to -20VDC @ 0.5 amp (–1.25V to –15V @ 1 amp).
• +12V +5% @ 1 amp.
• –12V +5% @ 1 amp.
• +5V +5% @ 1 amp.
• 30VAC center tapped @ 1 amp.
• Load regulation - all DC supplies less than 0.2V no load to 0.5A.
• Line regulation - all DC supplies less than0.2V 105 to 135V.
• Hum and ripple - all DC supplies less than 0.01V RMS.
• Short protection - all DC supplies-internal IC thermal cutoff.
• Fuse 1.25A 250V.
Variable Resistance (undedicated):
• 1kΩPotentiometer
• 100kΩPotentiometer
USERS DESCRIPTION OF FRONT PANEL CONTROLS
1) On/Off Switch - Allows power to be applied to all outputs. Switch will
light when on.
2) Fuse Holder - Easy access for replacement of 1.25A fuse.
3) Power Output Terminals - This provides 30VAC center tapped at
15 VAC; also provides output terminal for positive and negative
variable voltages.
4) Variable Positive Voltage Control - Varies positive voltage from 1.25
to 20V at indicated output connector pin.
5) Variable Negative Voltage Control - Varies negative voltage from
–1.25V to –20V at indicated output connector pin.
6) Power Output Bredblox - Output terminals for GND, –12, +12, and +5.
7) Output terminals for 1k and 100k undedicated potentiometers.
8) 1kΩundedicated potentiometer.
9) 100kΩundedicated potentiometer.
1
2
3
4
5
7
8 9
6
Figure C
Mount down flush with PC board. The
value may be marked on the on the
back side of pot.
Cut off excess lead length after
soldering.
Figure B
Note: One side of the
bracket is longer. Mount
this side to the PC board.
Mount the bracket to the
top legend side of the PC
board with a 4-40 x 1/4”
screw and fiber washer.
Figure A
Mount the connector as shown and solder the
pins of the connector.
-5-
INSTALL COMPONENTS TO PC BOARD
Start Here
S1 - 5-Pin Connector
(see Figure A)
L-Bracket
(see Figure B)
VR4 - 100kΩPot
VR3 - 1kΩPot
(see Figure C)
S3 - 3-Pin Connector
S2 - 3-Pin Connector
(see Figure A)
L-Bracket
(see Figure B)
C8 - 0.1µF Mylar (104)
(see Figure D)
Bottom Left Corner of PC Board
Top Left Corner of PC Board
Figure D
Bend the capacitor at a 45O
angle before soldering. Cut off
excess leads.
Cut off tab
PC Board
4-40 x 1/4”
Screw
Top Legend
Side of
PC Board
Fiber
Washer
Figure G
Diodes have polarity. Mount them
with the band as shown on the top
legend.
-6-
INSTALL COMPONENTS TO PC BOARD
C11 - 100µF 25V
(see Figure E)
R1 - 120Ω5% 1/4W Resistor
(brown-red-brown-gold)
C6 - .1µF Mylar (104)
(see Figure D)
J28 - Jumper Wire
(see Figure F)
J6 - Jumper Wire
(see Figure F)
D12 - 1N4001 Diode
D11 - 1N4001 Diode
(see Figure G)
C14 - 100µF 25V Lytic
C17 - 100µF 25V Lytic
(see Figure E)
C10 - .1µF Mylar (104)
(see Figure D)
R2 - 120Ω5% 1/4W Resistor
(brown-red-brown-gold)
J2 - Jumper Wire
(see Figure F)
J3 - Jumper Wire
(see Figure F)
Figure F
Cut a piece of the #22 bare wire
long enough so that 1/4” of wire
passes through each hole in the
PC board after the wire is formed.
Band
Bottom Left Corner of PC Board
Figure E
These capacitors are polarized. Be
sure to mount them with the “+”
lead in the correct hole as marked
on the PC board. Mount the
capacitor lying flat on the PC board
as shown below. (+)
(–)
Start Here
INSTALL COMPONENTS TO PC BOARD
VR1 - 2kΩPot
VR2 - 2kΩPot
(see Figure C)
B1 - 4-Pin Bredblox
B2 - 4-Pin Bredblox
B3 - 4-Pin Bredblox
B4 - 4-Pin Bredblox
(see Figure H)
C12 - 100µF 25V Lytic
(see Figure E)
J26 - Jumper Wire
J7 - Jumper Wire
(see Figure F)
D15 - 1N4001 Diode
D14 - 1N4001 Diode
D13 - 1N4001 Diode
(see Figure G)
C15 - 100µF 25V Lytic
C16 - 100µF 25V Lytic
(see Figure E)
J4 - Jumper Wire
J1 - Jumper Wire
(see Figure F)
C13 - 100µF 25V Lytic
(see Figure E)
Bottom Left Corner of PC Board
-7-
Figure H
Hold the bredblock down flush
to the PC board from the top
legend side and solder the
metal pins in place. Then, melt
the plastic pins with your
soldering iron to hold the
plastic blocks in place, as
shown.
Start Here
Plastic Pins
Melt Pins
Figure I
Diodes have polarity. Mount them with
the band as shown on the top legend.
Figure J
These lytics must be mounted
horizontal to the PC board. Bend
the leads at right angles and then
insert the leads into the PC board
with the negative (–) lead and the
positive (+) lead in the correct holes
as marked on the PC board.
-8-
INSTALL COMPONENTS TO PC BOARD
C2 - 1000µF 35V Lytic
C4 - 1000µF 35V Lytic
(see Figure J)
Continue
L-Bracket
(see Figure B)
C7 - .1µF Mylar (104)
(see Figure D)
J5 - Jumper Wire *
(see Figure F)
C9 - .1µF (104) Mylar
(see Figure D)
L-Bracket
(see Figure B)
C1 - 1,000µF 35V Lytic
C5 - 1,000µF 35V Lytic
(see Figure J)
D1 - 1N4001 Diode
D2 - 1N4001 Diode
D3 - 1N4001 Diode
D4 - 1N4001 Diode
D5 - 1N4001 Diode
D6 - 1N4001 Diode
D7 - 1N4001 Diode
D8 - 1N4001 Diode
D9 - 1N4001 Diode
D10 - 1N4001 Diode
(see Figure I)
Bottom Right Corner of PC Board
C3 - 2200µF Lytic
Mount on foil side of PC board
Note the polarity
(see Figure J)
Top Right Corner
of PC Board
* Leftover wire will be used in
future sections.
Band
+
Start Here Continue
Start Here
-9-
MOUNTING THE PC BOARD
Note: The holes in the two side panels have been punched differently. Be sure that you have the correct side
panel when mounting them to the PC board.
IMPORTANT: Push the PC board up as far as possible before tightening the screws, as shown in Figure La.
Mount the back panel using four 4-40 x 1/4” thread cutting screws (see Figure K).
Mount the PC board to the side panels with four 4-40 x 1/4” screws (see Figure L).
Do not tighten the screws.
Figure L
4-40 x 1/4”
Screws
4-40 x 1/4”
Screws
Top Legend Side
of PC Board
Note: From the foil side of the PC board,
inspect the edges to be sure that there
are no component leads shorting against
the side panels.
Right Side
Left Side
Adjust the PC board
height with a 4-40 x
1/4” screw
4-40 x 1/4” Thread
Cutting Screws
4-40 x 1/4” Thread
Cutting Screws
Back Panel
Figure K
Right Side
Left Side
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