Related Manuals for Elenco Electronics XK-150
Summary of Contents for Elenco Electronics XK-150
- Page 1 DIGITAL / ANALOG TRAINER MODEL XK-150 A COMPLETE MINI-LAB FOR BUILDING, TESTING AND PROTOTYPING ANALOG AND DIGITAL CIRCUITS Instruction Manual Elenco Electronics, Inc. Copyright © 1998 Elenco Electronics, Inc. Revised 2001 REV-C 753273...
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Page 2: Parts List
Washer Flat #4 615005 Washer Flat 7mm x 12mm 624117 Lockwasher #4 INT 664008 Feet Rubber 664014 Fuse Holder Assembly 664016 Label XK-150 Case 622017 Line Cord 623027 Switch Slide 2P2T (SW2 - 3) 624002 Part # 131500 132000 134700... - Page 3 GENERAL SPECIFICATIONS FOR MODEL XK-150 Power Supplies: • +1.25V to 15VDC @ .25 amp • -1.25 to -20VDC @ .25 amp • +5V + 5% @ .5 amp • 30V AC center tapped at 15VAC @ .25 amp. • Load regulator all DC supplies less than .2V no load to .25A •...
- Page 4 USERS DESCRIPTION OF FRONT PANEL CONTROL undedicated potentiometer. Output Terminals for 1k undedicated potentiometers. Output Terminals for -15V power supply. Gnd Terminals for the +/-15 variable power supply. Output Terminals for +15V power supply. Variable Positive Voltage Control - Varies positive voltage from 1.25 to 15V at indicated output terminal. Variable Negative Voltage Control - Varies negative voltage from -1.25 to -15V at indicated output connector pin.
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Page 5: Power Supply
Your XK-150 has four basic trainers in a single package. They are, 4 independent power supplies, an analog trainer, a digital and a bredblock assembly trainer. We shall proceed in describing each trainer in the following sections. -
Page 6: Power Supply Testing
The following paragraphs give detailed instructions on testing the digital / analog trainer. Note that in the XK-150 trainer there are five major functions, (1) Power Supply (2) Logic Indicators (3) Function Generator (4) Logic Switches and (5) Data Switches. We shall proceed in testing out each section. -
Page 7: Circuit Description
CIRCUIT DESCRIPTION The XK-150 Power Supply features two variable output voltages and a fixed 5V. The variable voltages are 1.25V to 15V and --1.25 to --15V at up to .25 ampere maximum current. All supplies are regulated to better than .2V when going from no load to full load. - Page 8 The IN4001 has peak current rating of 10 amps. REGULATOR CIRCUIT The regulator circuit in the Model XK-150 power supply consists of a LM-317 integrated circuit. This IC is specially designed to perform the regulation function. Figure 6 shows a simplified circuit of how the LM-317 IC works.
- Page 9 Transistor Q5 is called the pass transistor. It controls the current reaching the output. Transistor Q3 and Q4 are emitter followers. Their function is to raise the impedance of the pass transistor. Note that transistor Q2, Q3, Q4, Q5 and resistor R1 form a close loop. Also note that the feedback to the base of Q2 is negative, that is, when the base of Q2 goes positive, the output at emitter Q5 goes negative.
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Page 10: Warranty Policy
LED to about 30mA. Your XK-150 Digital / Analog Trainer has been tested and conforms to our rigid requirements on performance and durability. It is guaranteed to be free of defects in workmanship, materials and construction for a period of 2 years. If this product should fail during normal use within the first 3 months from the date of purchase, Elenco will repair or replace the unit at no cost. -
Page 11: Schematic Diagram
SCHEMATIC DIAGRAM -10-... - Page 12 Elenco Electronics, Inc. 150 W. Carpenter Avenue Wheeling, IL 60090 (847) 541-3800 http://www.elenco.com e-mail: elenco@elenco.com...