Hi guys! After a morning of googling i've decided to realize a Schumann Resonator. Frequency is within 7.81Hz-7.85Hz. If anyone interested i'll post schematic and board
Attachments
attached follow schematic and pcb traces.
be warned! the two black trafos are a pair of custom eagle part i've made from a stock (0.01€/piece) so it's difficult to find. any supply with at leat 15vdc-0.5A out will be ok.
be warned! the two black trafos are a pair of custom eagle part i've made from a stock (0.01€/piece) so it's difficult to find. any supply with at leat 15vdc-0.5A out will be ok.
Attachments
here's the coil pcb! made with a 10x12 (cm) board.
remember that the circuit is an high power version... it can easily sustain a large house with more than one floor.
searching on the web i saw only version supplied with 5Vdc... this one is 12Vdc supplied
(obviously the output power can be adjusted)
in italy is saturday night so... no sleep until 5 a.m.
remember that the circuit is an high power version... it can easily sustain a large house with more than one floor.
searching on the web i saw only version supplied with 5Vdc... this one is 12Vdc supplied
(obviously the output power can be adjusted)
in italy is saturday night so... no sleep until 5 a.m.
Attachments
so i'm just came back from beach... my parents said: "we sleeped unusually well"... so i think this device isn't a fake!
about listen some music: more relax = more enjoying listening some music (at least i think it's so)
now some measurement about the pcb coil:
7.6ohm resistance
16uH inductance
the frequency measured after 24 hour of usage is changed (cause of temperature) to 7.86Hz so i adjusted the trimmer to obtain 7.83Hz
with this correction works at 7.83Hz during normal operation
about listen some music: more relax = more enjoying listening some music (at least i think it's so)
now some measurement about the pcb coil:
7.6ohm resistance
16uH inductance
the frequency measured after 24 hour of usage is changed (cause of temperature) to 7.86Hz so i adjusted the trimmer to obtain 7.83Hz
with this correction works at 7.83Hz during normal operation
other measurements and some calculations:
supplied with 12Vdc we obtain 8.48Vrms
the frequency 7.83Hz
the total resistance (coil + 100ohm resistor) is 107.6ohm
the inductance 16uH
we can now calculate current e output power:
I = Vrms / res = 8.48 / 107.6 = 78.9mA
P = Z * I^2 = 2 * pi * H * F * I^2 = 6.28 * 16 * 10^(-6) * 7.83 * 0.0789^2 = 5uW
this is a low output power, i expected to obtain at least 10mW. maybe i've calculated wrong?
any suggestions appreciated
supplied with 12Vdc we obtain 8.48Vrms
the frequency 7.83Hz
the total resistance (coil + 100ohm resistor) is 107.6ohm
the inductance 16uH
we can now calculate current e output power:
I = Vrms / res = 8.48 / 107.6 = 78.9mA
P = Z * I^2 = 2 * pi * H * F * I^2 = 6.28 * 16 * 10^(-6) * 7.83 * 0.0789^2 = 5uW
this is a low output power, i expected to obtain at least 10mW. maybe i've calculated wrong?
any suggestions appreciated
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