ELF Signal Receiver A project to detect Extremely Low Frequency (ELF) Signals Dependencies KiCAD Licences CERN-OHL-S GNU AGPLv3 CC-BY-SA-4.0 See 'LICENCE', 'LICENCE.CERN-OHL-S.txt', 'LICENCE.GNU-AGPLv3.txt', 'LICENCE.CC-BY-SA-4.0.txt' for more details.