74HC4066D settled switch drop
Campaign 152 candidate for batch 016. Author draft, awaiting independent review.

Open preview.html for the complete English reader. fixture.svg is the editable
schematic and fixture.png is its full-size 1800 x 1125 raster.

The experiment uses a Nexperia 74HC4066D,653 on a plain SO14 adapter, a
4.50 V rail and a 2.25 V signal. Both supplies share one reference. Turn the
chip rail on before the signal. Turn the signal off before the chip rail.
Use the complete setup, power sequence and meter procedure in the article.

The blank worksheet has no voltage or resistance observations. Fill or remove
its starter rows. Enter volts for rail/input/output and millivolts for drop.

    python3 switch_drop.py observations.csv
    python3 switch_drop.py constructed-examples.csv
    python3 -m unittest -v test_switch_drop

The example CSV contains constructed readings. Host checks exercise the
delivered program on a computer. Bench assembly and measurements are pending.
The fixture does not require target firmware.
