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Type: Posts; User: summitville

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  1. Closed: Re: Does it exist an AC to AC converter in small package for converting 220v to 110v?

    No, the turn-on phase angle, for equivalent 120 V rms, will be small enough that 220x1.414 will never be applied to the motor.
  2. Closed: Re: Does it exist an AC to AC converter in small package for converting 220v to 110v?

    If you know, then tell us exactly what percentage of the normal-life will be lost be using a Solid State Speed controller set to 50% power?
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    Re: Transformer and alternator

    From time 45:33 until 46:08 in your You-Tube video, the armature is spinning but the Arrows are not changing direction.
    That is very wrong & very misleading.
    Finally, at time 46:09, the video shows...
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    Re: Transformer and alternator

    OK, I see now that it is not a commutator but two slip rings = AC generator.
    Initially, the video does not show the alternating current - which is wrong and very confusing!
    Finally at time 46:43,...
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    Re: Transformer and alternator

    That You-Tube video is of a DC Generator, not an AC Alternator with magnets on the rotor.
    In an AC Alternator ... as the North Pole is leaving the stator coil, the following South Pole is...
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    Re: Transformer and alternator

    Since there appears to be no answer, I will try ...

    I will start with - I disagree with your above assumption.

    AC Alternator ...
    When the North Pole of the rotor passes by the coil,
    the...
  7. Closed: Re: Does it exist an AC to AC converter in small package for converting 220v to 110v?

    What if you installed a wall mounted electronic 230 Volt Variable Speed Fan Controller inside the J-box?
    And then permanently set the output to 50% Power?
    Something like this ...
    ...
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    Closed: Re: H-bridge 100khz recommendations

    Can you post the schematic diagram of your circuit ?

    You can you use ...
    a) A Full H-Bridge or
    b) A Half H-Bridge or
    c) A single MOSFET

    Are you designing a LC Resonant circuit?

    This...
  9. Closed: Re: How to implement timer to read sensor signal periodically without MCU

    Your Truth Table looks like a D-Latch
    D-LATCH
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    Closed: Re: hbridge control from mcu

    On further thought ...
    The passive Diode does not allow for +5 Arduino and 12 volts on the Gate.
    So use a transistor, a mosfet or a gate driver - your choice

    Also consider,
    a) Minimum Dead-Time...
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    Closed: Re: hbridge control from mcu

    Use a diode, a transistor, a mosfet or a gate driver - your choice
  12. Closed: Re: can boost converters cause gate loop ringing

    PIN #1 (SW) of the MT3608 is a Low Active MOSFET only, it does not source any current - it is not a Gate Driver - it is the "PWM switch".
    I assume you are trying to add an external MOSFET?
    Please,...
  13. Closed: Re: Trying to build an LED Driver which will run with Vehicle Battery

    He is saying, the current design is 4 LED'S in series per string at 1 amp

    Then ...
    4 strings = 4 amps
    8 strings = 8 amps
    16 strings = 16 amps

    The design can be changed from 4 LED's in series...
  14. [SOLVED]Closed: Re: Are there relays made for inductive loads

    Yes, there are Solid State Relays mfr by CRYDOM, that are specifically design and rated for highly inductive loads.
  15. Closed: Re: Switching Solar Panels in Series and Parallel

    Good luck finding an "inexpensive" relay with contacts that are rate at 250 Volts DC at 10 Amps.
    A relay with contacts that are "AC Rated" only, will not work.

    Why not just leave the panels...
  16. Closed: Re: How is data transferred from memory to PCIe cards?

    Exactly how any one specific NIC operates, is Driver dependent.

    Dolphin Driver uses both PIO & RDMA ...
    https://www.dolphinics.com/products/fast_TCP_UDP_IP_network_driver.html

    Some Drivers may...
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    Closed: Re: pulse width stretching

    Low Going Pulse Stretcher using two NAND Gates ...
    NAND_GATE
    scroll down for schematic
    Use "High Speed" and right hand device, best if, "Schmidt Trigger" Input
    Width of trigger pulse must be...
  18. Closed: Re: How to find a copy of "An Embedded Software Primer" book?

    This book ?
    BOOK


    Softcover
    ISBN 10: 8177581546
    ISBN 13: 9788177581546
  19. Closed: Re: Find dc voltage gain and phase margin from graph

    Why / how are you confused?
    Do you know what "DC Voltage Gain" means ?
    Do you know what "Phase Margin" means ?
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    Closed: Re: Solar panel regulator

    You need much more than a simple "Buck Converter" !
    Can you find a Charge Controller that is rated, at least 90 Volts input from the Solar Panel?...
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    Closed: Re: [moved] Digital Transition Capture

    Attached is a very "rough" idea for Latch & Hold

    1) The Data Signal is converted from "H-to-L" & "L-to-H" transitions to very narrow Pulses - ( width needs verified )
    2) One, or more, Data...
  22. Closed: Re: Using a potentiometer to measure arcseconds.

    Renishaw has +/- 0.5 arc-second absolute encoders, not cheap
    Renishaw


    Put a 10,000 Pulse / Rev Optical Encoder on the Drive Motor shaft.
    Add 130:1 reduction gears between the motor shaft and...
  23. Closed: Re: HELP with some basic (I think) electronics

    Q1) Where is the ground wire from the Arduino Uno Ground to the car ground?
    Q2) How are providing DC Power to the Arduino Uno ?
  24. Closed: Re: Is this usb relay board safe for high powers?

    "...
    The USB specification has clearly provided guidelines as to how power should be utilized from the USB port, and surging currents produced by high-current mechanical relays is strictly...
  25. Closed: Re: Rotor shaft within AC solenoid question

    Is the Stainless Steel shaft magnetic?
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