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Ideas for using 12-48V phantom power to drive a 3v electret condenser microphone

published Feb 11, 2019 12:15   by admin ( last modified Feb 11, 2019 12:14 )

Not many sound cards I have found have multiple inputs for 3V electret condenser microphones. Maybe that makes sense, since such small mics are often used with headsets and as lapel/lavalier microphones, and those tend to be wireless if you're handling more than one.

Still, it would be fun to make a thingy that converts 48V phantom power to work with an elecret. Actually you can buy such an adapter off the shelf from Røde for about €20. That is probably the sane thing to do:

Rode VXLR+

However many people have thought about and designed their own solutions for this.

links
audio - Phantom Power supply for Electret mic - Electrical Engineering Stack Exchange
Convert 48V Phantom Power to 9V
This one is more about powering electrets in general, good read! Especially intrigued about just using two batteries in series and that's it:
Powering microphones
One of TI's examples is downregulating from 48V for the below circuit:
LM317HV 60V Input, 1.5A Adjustable Output Linear Regulator | TI.com