TELEPHONE_SOUND_LEVEL_METER_MONITOR

Published:2009/7/7 22:05:00 Author:May | From:SeekIC

The telephone-line decibel meter and line-voltage sensor shown lets you accurately monitor and adjust telephone sound levels. The 600-Ω resistor properly terminates the line. Power drain from the 9-V battery is 2 mA, and the meter provides ±30 dB range.



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