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2. AND gate - Wikipedia

   en.wikipedia.org/wiki/AND_gate

   The AND gate is a basic digital logic gate that implements logical conjunction (∧) from mathematical logic – AND gate behaves according to the truth table. A HIGH output (1) results only if all the inputs to the AND gate are HIGH (1). If not all of the inputs to the AND gate are HIGH, a LOW output results.

3. LED tube - Wikipedia

   en.wikipedia.org/wiki/LED_tube

   LED tubes. LED tube is a type of LED lamp used in fluorescent tube luminaires with G5 and G13 bases to replace traditional fluorescent tubes. [1] As compared to fluorescent tubes, the most important advantages of LED tubes are energy efficiency and long service life. LED tubes are sometimes also referred to as ‘LED fluorescent tubes’.

4. Wired logic connection - Wikipedia

   en.wikipedia.org/wiki/Wired_logic_connection

   When driving a load, the HIGH output is reduced by the pull-up's voltage drop, though the LOW output is almost 0V. But if diode logic is used, each input requires a diode, and the LOW output voltage will additionally be raised by the diode's forward voltage. Care should be taken to ensure the output still lies within valid voltage levels.

5. Diode logic - Wikipedia

   en.wikipedia.org/wiki/Diode_logic

   A voltage source's output resistance and the subsequent gate's pull-up/down resistor form a voltage divider that weakens voltage levels. This decreases high voltages in OR gates and increases low voltages in AND gates. Thus the feasible amount of cascading is limited by the value of V F and the high-low voltage difference. With special designs ...

6. NAND gate - Wikipedia

   en.wikipedia.org/wiki/NAND_gate

   In digital electronics, a NAND gate (NOT-AND) is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate. A LOW (0) output results only if all the inputs to the gate are HIGH (1); if any input is LOW (0), a HIGH (1) output results.

7. Logic gate - Wikipedia

   en.wikipedia.org/wiki/Logic_gate

   The semiconductor logic gate, on the other hand, acts as a high-gain voltage amplifier, which sinks a tiny current at its input and produces a low-impedance voltage at its output. It is not possible for current to flow between the output and the input of a semiconductor logic gate.