| 1. |
Conditioning means to connect the inputs to either Hi (V+) or Lo (gnd)
Are you getting the idea that this is an important concept?
Often, this is done through a 100 K ohm resistor.
This makes it very easy to “inject” the opposite condition to the pin
when needed.
| This doesn’t work! Look at it. When you close
the push button’s connection, you would only create a short circuit on
the power supply. |
 |
|
| 2. |
All systems are controlled by their inputs. |
| 3. |
If you don’t recognize the word “ectoplasm,” it just means I’m dating
myself. Take an evening and watch the old “GhostBusters” movie.
Don’t connect the tips of the probes together. These act
like anteneas. |
| 4. |
Well? What causes the problems? |
| 5. |
Unconditioned inputs => unpredictable outputs. |
| 6. |
Read the data sheet! |
| 7. |
Again – Look at table 35-1 for the definition. |
| 8. |
Remember that results from the 4046 output was a square wave.
...clock off clock off clock off clock off clock off clock off clock off
clock off clock off clock ...
It was read as ½ of V+ because of an averaging effect.
| But this is a different situation. Consider that at
the very beginning of the rolldown, it migh be fast enough for the DMM
to show an averaging effect.
But it is not a square wave. The measurement at a single output of the
4017 would be... |
 |
I emphasize “might average” because the count might be too slow for
the DMM to automatically average. |
| 9. |
If you are unsure, use the winscope and your test probe to check it out.
(LINK
TO VIDEO) |
| 10a. |
Take this info right from the Data Sheet. |
| 10b. |
The other outputs move from Hi to Lo with each clock signal.
The carry out holds this states for the duration of 5 clock signals, then
switches. |
