Real time low frequency over Whatsapp

ashok

Member
2002-06-06 4:43 am
3RS
I was figuring out how to send low frequencies signals real time over Whatsapp. Say 20 to 200 Hz. The mic circuit probably only carries 300 to 5000 Hz. So maybe upconvert the frequencies by about 15 ( making it 300 to 3 Khz) and then divide it down the other end ? Or is there an easier solution ?
This way it will remain ( almost!) real time !
Thanks.

Edit: Maybe amplitude modulate a 2 Khz signal with the LF and then filter out the 2Khz at the other end ?
 
Last edited:

scott wurcer

Disabled Account
2004-01-26 3:03 pm
Belmont MA
I was figuring out how to send low frequencies signals real time over Whatsapp. Say 20 to 200 Hz. The mic circuit probably only carries 300 to 5000 Hz. So maybe upconvert the frequencies by about 15 ( making it 300 to 3 Khz) and then divide it down the other end ? Or is there an easier solution ?
This way it will remain ( almost!) real time !
Thanks.

Edit: Maybe amplitude modulate a 2 Khz signal with the LF and then filter out the 2Khz at the other end ?

You could modulate one channel and use the other as a clock to synchronously demodulate, a simple search will offer several simple circuits.