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  2. Regenerative circuit - Wikipedia

    en.wikipedia.org/wiki/Regenerative_circuit

    The tickler coil is visible inside the tuning coil and is turned by a shaft from the front panel; this type of adjustable transformer was called a variocoupler. A regenerative circuit is an amplifier circuit that employs positive feedback (also known as regeneration or reaction ).

  3. Transformer types - Wikipedia

    en.wikipedia.org/wiki/Transformer_types

    A planar transformer Exploded view: the spiral primary "winding" on one side of the PCB (the spiral secondary "winding" is on the other side of the PCB) Manufacturers either use flat copper sheets or etch spiral patterns on a printed circuit board to form the "windings" of a planar transformer, replacing the turns of wire used to make other ...

  4. Voltage converter - Wikipedia

    en.wikipedia.org/wiki/Voltage_converter

    The output will usually be DC in the range 1.5–24 V. Power supplies that output either 100–120 V AC or 210–240 V AC are available; they are called inverters, due to the conversion from DC to AC rather than the voltage change. The output frequency and waveform of an inverter may not accurately replicate that supplied by mains electricity ...

  5. Electric gate - Wikipedia

    en.wikipedia.org/wiki/Electric_gate

    The backbone of any electric gate, whether automatic or not, is the electric gate motor, two distinct motor types exist hydraulic, or electromechanical. This is the electric device which actually enables the electric gate to open and close without having to manually push the gate.

  6. Residual-current device - Wikipedia

    en.wikipedia.org/wiki/Residual-current_device

    A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) [a] is an electrical safety device, more specifically a form of Earth-leakage circuit breaker, that interrupts an electrical circuit when the current passing through line and neutral conductors of a circuit is not equal (the term residual relating to the imbalance), therefore ...

  7. List of 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_7400-series...

    quad 2-input NAND gate open-collector 14 SN74LS03: 74x04 6 hex inverter gate: 14 SN74LS04: 74x05 6 hex inverter gate open-collector 14 SN74LS05: 74x06 6 hex inverter gate open-collector 30 V / 40 mA 14 SN74LS06: 74x07 6 hex buffer gate: open-collector 30 V / 40 mA 14 SN74LS07: 74x08 4 quad 2-input AND gate: 14 SN74LS08: 74x09 4 quad 2-input AND ...

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