molecule
AM/FM Receiver Molecule
Public Made by Adomby adom
USB-powered AM/FM receiver on an Adom Molecule: discrete BJT and op-amp superhet (10.7 MHz and 455 kHz IFs), STM32G0B1 tuning, self-calibration and USB audio over one USB-C cable. 96 x 96 mm pin grid, 4 layers, KiCad 10.
main
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(kicad_sch
(version 20251024)
(generator "eeschema")
(generator_version "10.0")
(uuid "a669f4f5-fc01-5a8e-8c40-fcabd5203313")
(paper "A3")
(title_block
(title "10.7 MHz IF & second conversion to 455 kHz")
(date "2026-10-02")
(rev "B (molecule)")
(company "Adom")
(comment 1 "4-layer PCB, JLCPCB-compatible rules")
(comment 2 "Generated from tools/design.py (single source of truth)")
)
(lib_symbols
(symbol "AMFM:CeramicFilter_3pin"
(pin_names (offset 0.254))
(exclude_from_sim yes)
(in_bom yes)
(on_board yes)
(in_pos_files yes)
(duplicate_pin_numbers_are_jumpers no)
(property "Reference" "FL"
(at 0 6.35 0)
(show_name no)
(do_not_autoplace no)
(effects (font (size 1.27 1.27)))
)
(property "Value" "HCCF3-10.700-LTCVS3L"
(at 0 5.08 0)
(show_name no)
(do_not_autoplace no)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" "AMFM:HCCF3_SMD-3P_7.0x3.0mm"
(at 0 -8.89 0)
(show_name no)
(do_not_autoplace no)
(hide yes)
(effects (font (size 1.27 1.27)))
)
(property "Datasheet" ""
(at 0 0 0)
(show_name no)
(do_not_autoplace no)
(hide yes)
(effects (font (size 1.27 1.27)))
)
(property "Description" "10.7 MHz ceramic band-pass filter, 3 terminals (In/GND/Out), 330 ohm"
(at 0 0 0)
(show_name no)
(do_not_autoplace no)
(hide yes)
(effects (font (size 1.27 1.27)))
)
(property "ki_keywords" "ceramic filter IF 10.7MHz"
(at 0 0 0)
(show_name no)
(do_not_autoplace no)
(hide yes)
(effects (font (size 1.27 1.27)))
)
(symbol "CeramicFilter_3pin_0_1"
(rectangle
(start -5.08 3.81)
(end 5.08 -2.54)
(stroke (width 0.254) (type default))
(fill (type background))
)
(polyline
(pts (xy -1.27 2.54) (xy -1.27 -0.635))
(stroke (width 0.254) (type default))
(fill (type none))
)
(polyline
(pts (xy 1.27 2.54) (xy 1.27 -0.635))
(stroke (width 0.254) (type default))
(fill (type none))
)
(rectangle
(start -0.635 2.286)
(end 0.635 -0.381)
(stroke (width 0.254) (type default))
(fill (type outline))
)
(polyline
(pts (xy -2.54 1.27) (xy -1.27 1.27))
(stroke (width 0) (type default))
(fill (type none))
)
(polyline (pts (xy 1.27 1.27) (xy 2.54 1.27)) (stroke (width 0) (type default)) (fill (type none)))
)
(symbol "CeramicFilter_3pin_1_1"
(pin passive line
(at -7.62 1.27 0)
(length 2.54)
(name "IN" (effects (font (size 1.27 1.27))))
(number "1" (effects (font (size 1.27 1.27))))
)
(pin passive line
(at 0 -5.08 90)
(length 2.54)
(name "GND" (effects (font (size 1.27 1.27))))
(number "2" (effects (font (size 1.27 1.27))))
)
(pin passive line
(at 7.62 1.27 180)
(length 2.54)
(name "OUT" (effects (font (size 1.27 1.27))))
(number "3" (effects (font (size 1.27 1.27))))
)
)
(embedded_fonts no)
)
(symbol "Connector:TestPoint"
(pin_numbers (hide yes))
(pin_names (offset 0.762) (hide yes))
(exclude_from_sim no)
(in_bom yes)
(on_board yes)
(in_pos_files yes)
(duplicate_pin_numbers_are_jumpers no)
(property "Reference" "TP"
(at 0 6.858 0)
(show_name no)
(do_not_autoplace no)
(effects (font (size 1.27 1.27)))
)
(property "Value" "TestPoint"
(at 0 5.08 0)
(show_name no)
(do_not_autoplace no)
(effects (font (size 1.27 1.27)))
)
(property "Footprint" ""
(at 5.08 0 0)
(show_name no)
(do_not_autoplace no)
(hide yes)
(effects (font (size 1.27 1.27)))
)
(property "Datasheet" ""
(at 5.08 0 0)
(show_name no)
(do_not_autoplace no)
(hide yes)
(effects (font (size 1.27 1.27)))
)
(property "Description" "test point"
(at 0 0 0)
(show_name no)
(do_not_autoplace no)
(hide yes)
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