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  1. Thread: Blinking Lights

    by gar
    Replies
    84$$
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    2,816

    140727-2230 EDT markstg: In posts 28, and...

    140727-2230 EDT

    markstg:

    In posts 28, and 31 I suggested you try a GE dimmable CFL. This may not meet some other criteria, but I believe you will see much less flicker.

    In post 34 I provided...
  2. Replies
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    140723-2012 EDT mopower steve: I expect...

    140723-2012 EDT

    mopower steve:

    I expect near zero infant mortality on good quality electronic products, and probably a minimum of 10 year life of continuous use before significant failures...
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    Reliability CREE LED

    140722-1151 EDT

    I purchased a CREE 9.5 W LED bulb 10-5-2013. Since about January 2014 this has been on about 16 hours per day. It was mounted in a Home Depot socket and reflector, but otherwise...
  4. Thread: Blinking Lights

    by gar
    Replies
    84$$
    Views
    2,816

    140717-1130 EDT The light flicker is a result...

    140717-1130 EDT

    The light flicker is a result of a transient condition (motor turning on). Power factor is a term that that relates to steady state conditions. It is hard to justify the concept of...
  5. Replies
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    212

    140716-2146 EDT Attached is a photo of a...

    140716-2146 EDT

    Attached is a photo of a homemade high voltage probe good for in excess of 30,000 V and compensated to about 1 MHz. This was made in 1955 for research on automotive ignition...
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    140714-2230 EDT An experiment I have...

    140714-2230 EDT

    An experiment I have previously performed confirms what GoldDigger told you. In a fully insulated can, with the can vertical, the heat sink surface temperature of a 10 W LED was up...
  7. Replies
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    140712-1953 EDT You have not defined the kind...

    140712-1953 EDT

    You have not defined the kind of motor.

    If I assume a DC permanent magnet motor, then there is no stator winding, only an armature winding.

    Use an ohmmeter on the armature....
  8. Thread: Blinking Lights

    by gar
    Replies
    84$$
    Views
    2,816

    140712-1946 EDT markstg: I believe you are...

    140712-1946 EDT

    markstg:

    I believe you are using a flawed analysis by using a steady state linear load analysis on a transient event with a time varying non-linear load.

    If I supply an...
  9. Thread: Blinking Lights

    by gar
    Replies
    84$$
    Views
    2,816

    140711-1647 EDT markstg: What is the time...

    140711-1647 EDT

    markstg:

    What is the time constant of an RC circuit of 300 ufd and 1.7 ohms?

    It is 300*1.7/1,000,000 seconds, or 510 microseconds, or 0.51 milliseconds. One half of a 60 Hz...
  10. Replies
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    436

    140711-0747 EDT What is the question in the...

    140711-0747 EDT

    What is the question in the original post?

    Is the question how to work with a 0-10 V dimming control signal because the lights have been purchased and that is what must be used?...
  11. Thread: Blinking Lights

    by gar
    Replies
    84$$
    Views
    2,816

    140710-2242 EDT markstg: Why do you think a...

    140710-2242 EDT

    markstg:

    Why do you think a capacitor across the line will prevent or reduce light flicker?

    Try the experiment.

    For a non-valid comparison --- what is the reactance of...
  12. Replies
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    140710-2211 EDT darekelec: There may be a...

    140710-2211 EDT

    darekelec:

    There may be a big difference depending upon what is the reason and basis for your question.

    For example:

    If you connect a TED 1000 energy monitor to a...
  13. Thread: Blinking Lights

    by gar
    Replies
    84$$
    Views
    2,816

    140710-1026 EDT There needs to be some...

    140710-1026 EDT

    There needs to be some controlled experiments performed.

    Some rough tests I have performed are:

    A GE dimmable CFL 26 W is moderately insensitive to sine wave voltage...
  14. Thread: Blinking Lights

    by gar
    Replies
    84$$
    Views
    2,816

    140709-1714 EDT markstg: Since current and...

    140709-1714 EDT

    markstg:

    Since current and voltage overlap on the plot I can not really see the amount of voltage drop, but it looks about 2 V. Also motors other than yours are causing voltage...
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    140704-0740 EDT iwire: Electronic circuits...

    140704-0740 EDT

    iwire:

    Electronic circuits can be designed and built today to achieve 50 year life, except possibly for the electrolytic capacitors.

    From my own home experience this is not...
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    362

    140703-2346 EDT titan1021: From your photos...

    140703-2346 EDT

    titan1021:

    From your photos it appears that the system uses GE RR type relays. Fundamentally the RR relay is a very useful switch.

    An RR relay is a mechanically bistable...
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    140703-0744 EDT A ferromagnetic transformer...

    140703-0744 EDT

    A ferromagnetic transformer (iron (steel) core) will work with any input voltage up to some maximum. Basically there is no lower limit. The maximum is not generally a sharp...
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    480

    140626-0946 EDT Jraef and others: A Simpson...

    140626-0946 EDT

    Jraef and others:

    A Simpson 260 is not an iron vane instrument. It is a moving coil instrument, described as a Weston-d'Arsonval type movement.

    Older 260s used a pivot and...
  19. Thread: open neutral

    by gar
    Replies
    8$$
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    270

    140622-1413 EDT Quite possibly. With the...

    140622-1413 EDT

    Quite possibly.

    With the neutral open at the weatherhead this means all neutral current will flow thru whatever paths there are to one or more ground rods at power company...
  20. Replies
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    445

    140621-1938 Canton: If I assume a linear...

    140621-1938

    Canton:

    If I assume a linear drop in voltage over a 15 minute period from 2.00 to 1.67 V, then average voltage is 1.835 V over this time period. Now assume the given power at this...
  21. Replies
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    445

    140621-1519 EDT Canton: The information in...

    140621-1519 EDT

    Canton:

    The information in your first post is very confusing.


    Assuming 6 cells at a nominal 2 V each and, thus, 12 V total for one battery, then for 119 ampere-hours at 12...
  22. Thread: Wi-Fi light Sensor

    by gar
    Replies
    7$$
    Views
    289

    140621-1115 EDT stubits: I can probably...

    140621-1115 EDT

    stubits:

    I can probably help you. Send a PM to me with more details.

    .
  23. Replies
    39$$
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    1,109

    140617-1051 EDT Going back to the original...

    140617-1051 EDT

    Going back to the original post the question reads ---
    "If the contacted resistance of a connection increases, and the current of the circuit (load) remains the same, the voltage...
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    153

    140611-2355 EDT DrSparks: What is the...

    140611-2355 EDT

    DrSparks:

    What is the meaning of
    "the magnetic stabilization between the primary and secondary coils of the core"?

    .
  25. Replies
    39$$
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    1,109

    140609-1703 EDT In the example I suggested,...

    140609-1703 EDT

    In the example I suggested, 240 V with a 240 ohm load in series with a low resistance contact, the calculated current values are 0.999968335 A and 0.999916674 A. The change in...
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