Elenco Electronics XK-550 Instruction Manual Download Page 4

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INTRODUCTION

POWER SUPPLY

Model XK-550 has five built-in power supplies which
will satisfy 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 over 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 .5 amp and the
voltage will change less than 150 millivolts.

All

supplies are also short circuit protected by using
integrated circuit regulator devices.

The analog trainer contain a complete function
generator capable of producing sine, square and
triangle waveform. The frequency of this generator
is continuously variable from one hertz to over

100,000 hertz in five steps. A fine tuning control
makes 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 designs.

They consist of a clock

generator, two no bounce logic switches, 8 LED
indicator lamps and 8 data switches.

These

functions will make it easy to do your digital
experiments.

Congratulations on your purchase of the Elenco
Model XK-550 Digital / Analog Trainer. This trainer
is designed to simplify designing of digital and
analog circuits. It contains most of the necessary
test equipment needed to build and test these
circuits.

Your XK-550 has four basic trainers in a single
package. They are, 5 independent power supplies,
an analog trainer, a digital and a bredblock
assembly trainer. We shall proceed in describing
each trainer in the following sections.

ANALOG TRAINER  SECTION
FUNCTION GENERATOR

Summary of Contents for XK-550

Page 1: ...ion Manual For Trainer with Organizer Case Tools and meter not included Copyright 2004 1994 by Elenco TM Electronics Inc All rights reserved Revised 2004 REV G 753550 No part of this book shall be rep...

Page 2: ...o 100kHz in 5 steps continuously variable Fine frequency adjust 10 1 approximate Amplitude variable 0 15Vpp Output impedance 330 short protected DC offset change 10V from zero crossing Digital Section...

Page 3: ...ne generator waveforms 10 Output terminals for all functions as stated 4 pins per block 11 Two logic switches These are no bounce logic switches Give one signal state change per movement of switch 12...

Page 4: ...iable from one hertz to over 100 000 hertz in five steps A fine tuning control makes selection of any frequency easy The output voltage amplitude is variable between 0 to 15Vpp The output impedance is...

Page 5: ...Check the variable voltage supplies in the same manner Set the output voltage between 10 15 volts Place the 25 10 watt resistor across the output terminal The voltage should stay within 0 20 volts of...

Page 6: ...t on the output voltages This is because of the specially designed IC circuits used in the XK 550 circuits Severe overloading or even shorting the output circuits will not damage the supplies Special...

Page 7: ...n the anode is more positive than the cathode Thus current will flow in short bursts as shown in Figure 5 The DC load current may be one ampere but the peak diode current may be three times that There...

Page 8: ...7 SCHEMATIC DIAGRAM...

Page 9: ...8...

Page 10: ...WITCHES There are eight data switches labeled SW1 to SW8 The circuit is very simple To perform the desired functions there is a double throw double pole switch One end is connected to the 5V the other...

Page 11: ...EQ switch On pin 7 the FINE FREQ ADJ variable resistor controls the actual frequency output These two components form the RC time constants for the oscillator frequency The VCO produces a squarewave s...

Page 12: ...tor 337805 1 LM7812 Regulator 337812 1 LM7912 Regulator 337912 8 LED Red 350002 2 74HC04 Integrated Circuit 39HC04 Qty Description Part Miscellaneous 1 Transformer 44K500 1 PC Board 514550 1 Fuse 1 25...

Page 13: ...wdriver ST 1 4 1 2 Side Cutter JW 140 Wire Jumper Kit ST 7 IC Puller ST 3 Wire Stripper SP 2 Desoldering Pump TM 30 Tool MTG Kit METERS ANY of the following will fit the special slope cavity METERS AV...

Page 14: ...400mV 4V 40V 400V 1000V Accuracy 400mV 4V 40V 400V 0 5 3 1000V 0 8 3 AC current 40 A 400 A 4000 A 40mA 400mA 10A Accuracy 40 A 400 A 4000 A 1 5 5 40mA 400mA 2 5 10A 2 5 5 DC current 40 A 400 A 4000 A...

Page 15: ...se ElencoTM will repair or replace the unit at no cost For the remainder of the warranty period a nominal service charge is required to cover shipping and handling When returning merchandise for repai...

Page 16: ...ElencoTM 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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