Lab 6 - Nasty Realities
The purpose of this lab is to show that digital systems can be affected by
"nasty realities" such as capacitance and how some of these problems can be
worked around. You don't even need to use a computer for this lab, so
be happy! :)
- As always, read the lab before starting anything.
- Most problems in this lab will come from improperly wired bread boards.
- Don't use the oscilloscope probes as the output cables from your pulse generator.
This will not work! Use the cables with the BNC connector on one end and the red and black
connectors on the other end.
- Whenever you are using the inverter chip, you need to have pin 14 connected to
VCC and pin 7 connected to ground. If you don't do this, the invertors will not
work.
- You will only need to use 5 of the 6 invertors in the chip for the first part.
You do this by using the wires provided to connect the outputs of one invertor to the
next invertor.
- When you use the oscilloscope for part 1 to view the waveform, you will have a fairly clean signal
with a peak to peak voltage of about 5 volts.
- If you have a lot of noise in your signal, then you have probably messed up your
wiring, so either check it or re-do it.
- When using the ribbon cable, check the numbers on the pin so you have your output
and input correct.
- Vpp for high-to-low and Vpp for low-to-high are two different measurements.
- Make sure you are using the correct resistors for the different parts of the lab.
RED BLACK BROWN is 200 Ohms, ORANGE ORANGE BROWN is 330 Ohms.
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