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    160208-1519 EST Additional comments. Using...

    160208-1519 EST

    Additional comments.

    Using a Kill-A-Watt EZ for measurements:

    25 W Incandescent
    123.4 V, 0.20 A, 25.2 W, 25.2 VA, 1.00 PF

    Old CFL
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    160207-2212 EST Throughout the day I have...

    160207-2212 EST

    Throughout the day I have played with three or four bulbs.

    By tonight the Feit is not as bad as early today. Appears to be temperature sensitive. At one point after being off...
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    160207-1230 EST My just above current and FFT...

    160207-1230 EST

    My just above current and FFT plots were done with a Pico ADC-216 which has band limiting probably around 100 kHz.

    Today I was going to use a resistive shunt, 10 ohms, to get a...
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    160206-2355 EST FionaZuppa: Have you run...

    160206-2355 EST

    FionaZuppa:

    Have you run any of your own tests?

    The YouTube presentation is very poor.

    The time domain waveforms were not clear and may not have been a good...
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    160206-1715 EST GoldDigger: Yes some sort...

    160206-1715 EST

    GoldDigger:

    Yes some sort of transient load or change in the sysytem. I would like to have caught the occurance I saw.

    I have been thinking about my observed sidebands. Looks...
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    160206-1150 EST GoldDigger: Thanks. That is...

    160206-1150 EST

    GoldDigger:

    Thanks. That is an interesting possibility.

    Today I got the Pico ADC-216 to work for a while. This is 16 bit vs 8 bit resolution. Claims to have near 100 db...
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    160205-2458 EST Note that 10k and 1 ufd...

    160205-2458 EST

    Note that 10k and 1 ufd results in 3 db at 15 Hz. I did not bother to check this before the tests. 0.1 ufd and 3000 k might be a better choice with 3 db at 1 kHz.

    .
  8. Thread: gfci question

    by gar
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    160205-2355 EST I believe a GFCI internal test...

    160205-2355 EST

    I believe a GFCI internal test resistor is about 15,000 ohms, 8 mA at 120 V.

    .
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    Backyard experiment

    160205-2156 EST

    In the past I have measured ground voltage in my backyard. This was done with two screwdrivers pushed into the ground, and a high impedance voltmeter between the two probes. I...
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    160205-0945 EST Have you considered a plain...

    160205-0945 EST

    Have you considered a plain ordinary door jam mechanical switch? Assuming there is an appropriate door on the closet. Very high reliablity. Mine are 50 years old, and never a...
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    160203-2139 EST Some plots from the input...

    160203-2139 EST

    Some plots from the input current for a late1990s IBM PC:

    The current waveform is noisy because of the low current and the use of a clamp Hall device current sensor. The probe...
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    160203-1636 EST Update; Previously I did...

    160203-1636 EST

    Update;

    Previously I did not closely look at the details for installation of the Lutron in a 3-way application. I made some incorrect assumptions.

    The mechanical 3-way switch...
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    160203-1512 EST GoldDigger and junkhound have...

    160203-1512 EST

    GoldDigger and junkhound have provided you with a good and simple approach. The important point is to use a 4 terminal method of resistance measurement.

    To run an experiment on...
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    160203-1319 EST sparkyrick: Thanks for the...

    160203-1319 EST

    sparkyrick:

    Thanks for the link. It is somewhat more readable than the copy shipped with the sensor.

    For 3-way operation the blue wire, per the instructions, gets connected...
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    160203-1055 EST Strathead: Your comment is...

    160203-1055 EST

    Strathead:

    Your comment is why there needs to be a clear accurate definition of the logic required of the switching system.

    .
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    160203-1042 EST So that I don't leave false...

    160203-1042 EST

    So that I don't leave false information on how the Lutron works I have to say I don't know how the blue wire functions. It is possible the relay is not a SPDT contact arrangement,...
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    160203-0834 EST jasonsim: What purpose do...

    160203-0834 EST

    jasonsim:

    What purpose do your 3-way switches have once you add motion (occupancy sensors)?

    .
  18. 160203-0814 EST To clarify my 180 A or...

    160203-0814 EST

    To clarify my 180 A or whatever it was statement. I estimated an internal impedance for the B path to ground. From this Z (probaby mostly R) and the open circuit voltage from B to...
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    160202-2417 EST Maximum power in a variable...

    160202-2417 EST

    Maximum power in a variable load with a constant voltage source with a constant internal resistance of R occurs when the load resistance is R. Use calculus to prove it or trial and...
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    160202-2144 EST Some partial comments on how a...

    160202-2144 EST

    Some partial comments on how a particular motion sensor logically works.

    The sensor is a Lutron MS-OPS5MH-AL. This is a single pole or 3-way device.

    Somewhere it is stated...
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    160202-2119 EST GoldDigger: Your #4: I...

    160202-2119 EST

    GoldDigger:

    Your #4: I don't think that it is that simple.

    Is the function that you describe what the OP wants? I don't know because there is not a complete description of...
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    160202-1926 EST jasonsim: I standby my...

    160202-1926 EST

    jasonsim:

    I standby my original comment in post #2. I don't really know the precise specifictions of what you want to do.

    You assume I know what these specifications are...
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    160202-0057 EST LineLoss Pro is probably a...

    160202-0057 EST

    LineLoss Pro is probably a fraud for the most part. Hyper advertizing and no technical details. It may simply be a low pass filter. On the surface it is like the advertizing for...
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    160202-0050 EST Holly Tucker: Any...

    160202-0050 EST

    Holly Tucker:

    Any non-linear device will generate harmonics from a pure sine wave. Any non-sine wave already contains harmonics.

    A non-sine wave applied to a non-linear...
  25. 160202-0028 EST milldrone: Using your data...

    160202-0028 EST

    milldrone:

    Using your data for the problem transformer I plotted vectors.

    The line to line voltages defined a triangle. The three corner points defined a circle. The radius...
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