{"query": "Oscillator — LC resonance, the bench's own Schumann", "count": 20, "results": [{"id": "card_n_c39a51a03b6f", "title": "Oscillator — LC resonance, the bench's own Schumann", "shelf": "science", "surface": "secular", "snippet": "Energy sloshing between a coil and a capacitor rings at f = 1/(2π√(LC)); sealed:\n100 µH with 100 pF gives 1.591 MHz — the middle of the AM broadcast band: https://narrowhighway.com/s/1ee0d3ed486453eee"}, {"id": "card_c_f746297fd660", "title": "Schumann resonance — the Earth-ionosphere ca ↔ Oscillator — LC resonance, the bench's own S", "shelf": "connections", "surface": null, "snippet": "the cavity is an oscillator, lightning the impulse source, a Schumann receiver just a coil and an amplifier  — a concord the card itself states; mined + verified."}, {"id": "card_c_b94b0e3c6dfb", "title": "Radio-wave production — the chain leaves the ↔ Oscillator — LC resonance, the bench's own S", "shelf": "connections", "surface": null, "snippet": "Drive an antenna with the oscillator and the wave departs at c: λ = c/f — sealed:\nthe 1.591 MHz LC wave is ≈ 188 m long (floor(c·2π·10⁻⁷) = 188)  — a concord the card itself states; mined + verified."}, {"id": "card_src_word_schumann", "title": "schumann", "shelf": "dictionary", "surface": "secular", "snippet": "schumann: (noun) German pianist and composer of piano music; renowned for her interpretation of music, especially the music of her husband Robert Schumann (1819-1896) — syn: Clara Josephine Schumann ·"}, {"id": "card_n_91f3b5881075", "title": "Schumann resonance — the Earth-ionosphere cavity, sealed honestly at 7.83 Hz", "shelf": "science", "surface": "secular", "snippet": "The planet is a resonant cavity. Between the ground and the ionosphere, lightning\n(~50 strikes/second worldwide) continuously rings a spherical electromagnetic waveguide; the\nmeasured resonances sit a"}, {"id": "card_c_677eefd6b57a", "title": "Oscillator — LC resonance, the bench's own S ↔ Build a Crystal Radio", "shelf": "connections", "surface": null, "snippet": "This is the crystal radio's tuner and every radio's local oscillator.  — a concord the card itself states; mined + verified."}, {"id": "card_c_45b1fde0f875", "title": "Quartz at 32,768 Hz — a power of two on the  ↔ Oscillator — LC resonance, the bench's own S", "shelf": "connections", "surface": null, "snippet": "It is the highest power of two that stays low-power and stable — the oscillator meeting the divider chain.  — a concord the card itself states; mined + verified."}, {"id": "card_src_word_heterodyne_oscillator", "title": "heterodyne oscillator", "shelf": "dictionary", "surface": "secular", "snippet": "heterodyne oscillator: (noun) an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones — syn: local oscillator"}, {"id": "card_src_word_local_oscillator", "title": "local oscillator", "shelf": "dictionary", "surface": "secular", "snippet": "local oscillator: (noun) an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones — syn: heterodyne oscillator"}, {"id": "card_src_word_crystal_oscillator", "title": "crystal oscillator", "shelf": "dictionary", "surface": "secular", "snippet": "crystal oscillator: (noun) an oscillator that produces electrical oscillations at a frequency determined by the physical characteristics of a piezoelectric quartz crystal — syn: quartz oscillator"}, {"id": "card_src_word_quartz_oscillator", "title": "quartz oscillator", "shelf": "dictionary", "surface": "secular", "snippet": "quartz oscillator: (noun) an oscillator that produces electrical oscillations at a frequency determined by the physical characteristics of a piezoelectric quartz crystal — syn: crystal oscillator"}, {"id": "card_n_cdb747a427d2", "title": "Electronics — the resonant chain, from Ohm's law to the radio wave", "shelf": "science", "surface": "secular", "snippet": "One sealed chain runs the whole bench: Ohm's law (V = I·R), the capacitor's\nexponential clock (one time constant → 63.2% charged), the diode's exponential gate (current\ndoubles every ln2·nVT ≈ 17.9 mV"}, {"id": "card_c_d931ef4a580f", "title": "Radio-wave production — the chain leaves the ↔ Schumann resonance — the Earth-ionosphere ca", "shelf": "connections", "surface": null, "snippet": "Scale the cavity up from the bench to the planet and the same physics is the Schumann resonance: lightning the oscillator, the Earth-ionosphere gap the tuned circuit.  — a concord the card itself stat"}, {"id": "card_src_book_64151", "title": "Schumann — Richard Batka", "shelf": "gutenberg", "surface": "secular", "snippet": "Schumann, by Richard Batka (in de). Subjects: Schumann, Robert, 1810-1856; Composers -- Germany -- Biography. Read the full text (public domain): https://www.gutenberg.org/ebooks/64151"}, {"id": "card_src_book_36472", "title": "A Day with Robert Schumann — May Byron", "shelf": "gutenberg", "surface": "secular", "snippet": "A Day with Robert Schumann, by May Byron. Subjects: Schumann, Robert, 1810-1856. Read the full text (public domain): https://www.gutenberg.org/ebooks/36472"}, {"id": "card_src_word_clara_josephine_schumann", "title": "clara josephine schumann", "shelf": "dictionary", "surface": "secular", "snippet": "clara josephine schumann: (noun) German pianist and composer of piano music; renowned for her interpretation of music, especially the music of her husband Robert Schumann (1819-1896) — syn: Schumann"}, {"id": "card_c_106861f9474c", "title": "Varactor — tuning by voltage ↔ Oscillator — LC resonance, the bench's own S", "shelf": "connections", "surface": null, "snippet": "since f ∝ 1/√C, halving the capacitance raises the frequency by exactly √2  — a concord the card itself states; mined + verified."}, {"id": "card_n_73d989606f90", "title": "Radio-wave production — the chain leaves the bench", "shelf": "science", "surface": "secular", "snippet": "Drive an antenna with the oscillator and the wave departs at c: λ = c/f — sealed:\nthe 1.591 MHz LC wave is ≈ 188 m long (floor(c·2π·10⁻⁷) = 188): https://narrowhighway.com/s/1ee0d3ed486453eee0967146a5"}, {"id": "card_c_663f60b2cc20", "title": "Schumann resonance resonates with Fluid probability dynamics", "shelf": "connections", "surface": null, "snippet": "Both are eigenmode stories — standing waves of a bounded medium; the recurrence is RESONANCE, a map-aid, never a proof of unity."}, {"id": "card_src_book_49378", "title": "Robert Schumann, Tone-Poet, Prophet and Critic — Herbert F. (Herbert Francis) Peyser", "shelf": "gutenberg", "surface": "secular", "snippet": "Robert Schumann, Tone-Poet, Prophet and Critic, by Herbert F. (Herbert Francis) Peyser. Subjects: Schumann, Robert, 1810-1856. Read the full text (public domain): https://www.gutenberg.org/ebooks/4937"}]}