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  2. Blocking oscillator - Wikipedia

    en.wikipedia.org/wiki/Blocking_oscillator

    An ideal switch will present supply voltage V b across the primary, so in the ideal case V p = V b. V s, voltage across the secondary winding; V z, fixed load voltage caused by e.g. by the reverse voltage of a Zener diode or the forward voltage of a light-emitting diode (LED). I m, magnetizing current in the primary

  3. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    A number of light sculptures feature in this elaborate display which surrounds a Nativity scene set in a basement garage. Lights are sometimes mounted on frames—typically metal for large lights and plastic for miniature ones. These were first used for public displays on lampposts, street lights, and telephone poles in cities and towns. For ...

  4. Optical isolator - Wikipedia

    en.wikipedia.org/wiki/Optical_isolator

    Optical isolator for laser experiments. An optical isolator, or optical diode, is an optical component which allows the transmission of light in only one direction.It is typically used to prevent unwanted feedback into an optical oscillator, such as a laser cavity.

  5. Solid-state relay - Wikipedia

    en.wikipedia.org/wiki/Solid-state_relay

    Solid state relay with green LED Solid state contactor PCB mount solid-state DIL relay. A solid state relay (SSR) is an electronic switching device that switches on or off when an external voltage (AC or DC) is applied across its control terminals.

  6. Flyback diode - Wikipedia

    en.wikipedia.org/wiki/Flyback_diode

    Diagram of a simple circuit with an inductance L and a flyback diode D.The resistor R represents the resistance of the inductor's windings. A flyback diode is any diode connected across an inductor used to eliminate flyback, which is the sudden voltage spike seen across an inductive load when its supply current is suddenly reduced or interrupted.

  7. 7 Best Christmas Items at Home Depot That Can Be Reused ... - AOL

    www.aol.com/finance/7-best-christmas-items-home...

    From artificial Christmas trees to holiday lights, here are a few top picks. Check Out: 7 Winter Clothing Items You Should Buy at Costco Now Read Next: 4 Low-Risk Accounts Financially Savvy People ...

  8. PIN diode - Wikipedia

    en.wikipedia.org/wiki/PIN_diode

    The PIN diode obeys the standard diode equation for low-frequency signals. At higher frequencies, the diode looks like an almost perfect (very linear, even for large signals) resistor. The P-I-N diode has a relatively large stored charge adrift in a thick intrinsic region. At a low-enough frequency, the stored charge can be fully swept and the ...

  9. Protective relay - Wikipedia

    en.wikipedia.org/wiki/Protective_relay

    The DTOC relay has been used extensively in the United Kingdom but its inherent issue of operating slower for faults closer to the source led to the development of the IDMT relay. [1]: pp 30-31 A definite time over-current (DTOC) relay is a relay that operates after a definite period of time once the current exceeds the pickup value. Hence ...