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High Resolution Volume Unit Meter Simplifies CD Recording: 06/21/01
EDN-Design Ideas / (added 5/03) Digitally recorded music on CDs offers superior
quality to that recorded on vinyl records or tape, but most prerecorded CDs have an
annoying characteristic: The average volume levels of the recorded signal can vary by
as much as 14 dB from disk to disk. Significant variances, such as 4 dB, can occur
from track to track on a single CD. This variation can be a problem when recording
your own CDs because you can end up with large variations in loudness between
songs.... |
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Infrared Level Detector: Useful for liquids level detection and proximity
devices Up to50 cm. range, optional relay operation (Electronic circuit added 4/05) |
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LED Audio UV Monitor: logarithmic scale with3 dB steps, based in LM3915 IC
(Electronic circuit added 5/02) |
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LED Bar VU Meter: (circuit / schematic added 2/03) |
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LED Barograph Driver: (Electronic Schematic / circuit added 4/02) Fair
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Mono VU Meter I: (Electronic Circuit diagram added 03/03) |
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Precision Audio MilliVoltmeter: Measures10mV to50Volt RMS in eight ranges
Simply connect to your Avo-meter set @50µA range (Circuit added 9/04) |
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Sound Level Meter: (added 7/05) |
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Three Level Audio Power Indicator: Battery-operated Three LED display that
connect it to loudspeaker output (Circuit added 9/04) |
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Understanding Peak Reading Meters: includes1-example circuit diagram
(Electronic circuit added 5/02) |
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VU and PPM Audio Metering: circuits using analog needle meters (Electronic
circuit added 5/02) |
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VU Meter Amplifier: (Electronic Schematic / circuit added 4/02) |
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VU Meter: 5 led VU meter, in PDF format, includes circuit board, text in
Finnish (Electronic circuit added 5/02) |
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VU Stereo Meter: will indicate the volume level of the audio going to your
speakers by lighting up LEDs, based on LM3915 IC (Electronic circuit added 5/02) |
