How Does It Do It?

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How Does It Do It? Feb 28, 2017 17:58:35 GMT

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Post by Deleted on Feb 28, 2017 17:58:35 GMT

Mystery of Voltage Out of Nowhere

KDX has a Zoom H4 Digital Audio Recorder.

The Zoom is powered by 2 - AA batteries.

Each battery produces 1.2VDC, therefore both in series provides 2.4 VDC.

Yet the XLR balanced microphone input can be set to provide either 24 VDC or 48 VDC phantom power to a microphone.

Where is all that extra voltage coming from?

Admin Administrator Transmitting to the Universe and Beyond Posts: 1,353	How Does It Do It? Feb 28, 2017 20:54:17 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Admin on Feb 28, 2017 20:54:17 GMT A switching power supply upverter.
	Last Edit: Feb 28, 2017 20:54:44 GMT by Admin MRAM 1500 Charter Member ALPB Previous Chairman ALPB

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How Does It Do It? Feb 28, 2017 20:59:43 GMT

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Post by Deleted on Feb 28, 2017 20:59:43 GMT

Find Out By Asking

Admin had the answer! "A switching power supply upverter."

Fantastic!

I want to build one of those for the Alpmic so I can ditch the 9V battery and use one AA battery, but I need about 4 or 5 volts.

Where can I find an "upverter" circuit"

Post by Deleted on Feb 28, 2017 17:58:35 GMT

Post by Admin on Feb 28, 2017 20:54:17 GMT

Post by Deleted on Feb 28, 2017 20:59:43 GMT