Department of Aviation Engineering Technology
Superior University
Digital Techniques
AT-2226
Experiment No.1
Introduction to Digital Logic Trainer
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Digital Techniques Lab 1
Introduction to Digital Logic Trainer
Objective:
To familiarize our self with the use of trainer and to explore the different components of
Digital Trainer.
Equipment:
Digital Logic Trainer
Theory:
All experiments included in this manual have been performed on the EES-2001 logic trainer.
Before starting actual experiments; let us first familiarize our self with the use of EES-2001
trainer.
Measuring Power Supplies:
Connect the EES-2001 Trainer to the 220V AC power source and turn ON the Trainer.
Observe
+5V, + 12V, +15V and -15V LED’s ON, indicating these supplies are available for
experimentation. Verify +5V, +12V, 15V and -15V voltages using a Multimeter.
Measuring Logic Levels:
Try using the LED’s (L0-L15) to monitor the logic level.
1. Connect +5V power to the LED indicator L0. The LED should be ON indicating logic
1.
2. Connect LED indicator L0 to GND. the LED should be OFF indicating logic 0.
Test the clock:
Rotate the timer rate knob to counter clock wise position until extreme position is reached.
Connect the output CLK to the input of LED L0.the light should blink ON and OFF slowly.
The light blinks rapidly as the timer rate knob is rotated clock wise. It will stop blinking at
some point and then LED will be ON indicating a higher frequency.
Measure the Logic Level Coming from One of the Logic Switch (S2 to S9):
Connect the outputs S2 AND S2’ of switch (S2) to L0 and L1 respectively. The LED’s should
indicate the logic levels originating from the S2 switch.
1. Set switch S2 at a higher position, L0 should be OFF and L1 should be ON.
2. Set switch S2 at a lower position, L0 should be ON and L1 should be OFF.
4
BCD logic input:
Connect switches S2, S3, S4 and S5 to the four input marked as 8 4 2 1 on the SBB-63 board.
Apply BCD input using switches, it would be decoded and displayed on the seven- segment
display.
1. Set switch S2 at logic ‘1’ and rest of the switches at ‘0’, BCD digit ‘8’ will be displayed.
2. Set switch S3 at logic ‘1’ and rest of the switches at ‘0’, BCD digit ‘4’ will be displayed.
3. Set switch S4 at logic ‘1’ and rest of the switches at ‘0’, BCD digit ‘2’ will be displayed.
4. Set switch S5 at logic ‘1’ and rest of the switches at ‘0’, BCD digit ‘1’ will be displayed.
5. Set switches at the appropriate positions to display BCD numbers (0-9)
Conclusion:
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