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[on:]

hello arduino friends

does any one have arduino compartible vlf rx / tx module schematics ?

any help or guidence acceptable !

thank you all very musch for your time reading this !

[Reply #1 on:]

vlf rx / tx module

What's that?

______
Rob

[Reply #2 on:]

vlf transmiter and vlf receiver !

[Reply #3 on:]

VLF as in Very Low Frequency?
First Google result was this forum message second was this http://www.cdarc.co.uk/talknotes/VLF-G3XBM.pdf
Without more meaningful information that's the best we can do.

[Reply #4 on:]

VLF transmitters and receivers require very long antennas to transmit properly and operating at such frequencies is not a good choice at all unless you happen to be a nuclear powered submarine looking to receive missile launch orders while still submerged.

Lefty

[Reply #5 on:]

well it is going to be submerged ! and it is going to receive and send text ! but not more than a Km and not more that 100 m depth ! ALSO ! financially i am not able to buy a VW beatle, for sure not a Nuclear submarine  ! but thank you anyway !

[Reply #6 on:]

Fresh water or salt water?

[Reply #7 on:]

Was the circuit on page 12 of the linked pdf I supplied no good?

[Reply #8 on:]

salt water for sure !

i've quikly checked them and i thing that they are ok  ! haven't got the time to experiment my self on them yet ! thank you very much !