Instruction Manual

XK-550 DIGITAL KIT (DG-550-D) PARTS LIST
RESISTORS
Qty. Symbol Value Color Code Part #
8 R36 - R43 120Ω 5% 1/4W brown-red-brown-gold 131200
1 R15 220Ω 5% 1/4W red-red-brown-gold 132200
4 R16 - R19 1kΩ 5% 1/4W brown-black-red-gold 141000
16 R20 - R35 100kΩ 5% 1/4W brown-black-yellow-gold 161000
SEMICONDUCTORS
Qty. Symbol Value Description Part #
1 U7 SN7403 IC 337403
8 D18 - D25 LED Diode (red) 350002
2 U8, U9 74HC04 IC 39HC04
MISCELLANEOUS
Qty. Symbol Description Part #
10 SW4 - SW13 Slide Switch SPDT 541009
2 S4, S5 Connector 4-pin 591042
8 Spacer 1/4” #8 624124
2 Screw 642430
3 U7 - U9 Socket IC 14-Pin 664014
12 B7 - B18 Bredboard 665204
1 Bredblox 99426
INTRODUCTION
The Digital Section is the fourth package of the XK-550K kit that you are building. The Digital Section of your
trainer contains all of 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. We have also added a 730 tie point
Bredblox to your already existing 830 tie points, giving you a total of 1560 tie points to handle complex circuit
designs.
SPECIFICATIONS
• Data switches, eight DPDT, Hi 5V, low 0V.
• Logic switches, two no bounce with complementary output.
“On” voltage level 2.8V min., “Off” voltage level 1V max.
Input impedance 100kΩ.
• Eight LED readouts, 100kΩ input impedance.
• Clock frequency, 1Hz to 100kHz in 5 steps continuously variable.
• Clock amplitude, 5Vpp squarewave.
• Clock rise time, better than 100 nsec.
• Bredboard 730 tie points.
DG-550-D
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