This is a simple
schematic of audio power meter using LM3915 IC, this schematic can be
used to measure the actual output power of your amplifier. For an audio engineer, this schematic Seems to be very helpful, especially for checking of sound system installation and field
testing. Due to its logarithmic scale, the wide range of audio output
with only ten scales cans Also be measured. If you take an attention to
the pin number 5 of the LM3915,
see That you will from the input is not yet Rectified. At this input
pin, the negative swing will from the present. However, it is harmless
since the current is limited by R1, the LM3915 earnest therefore respond
only to positive cycle.
Download Skema :
Power Meter Schematic For Audio Amplifier
Password : asinan
Download Skema :
Power Meter Schematic For Audio Amplifier
Password : asinan
Note:
When
the speaker resistance is 4Ω, then, make R1=10kΩ, if the resistance of
speaker is 8Ω, make R1=8kΩ, and if the resistance of speaker is 16Ω,
make R1=30kΩ.
The absence of
peak detector or the detector will of averages give the circuit a fast
reading of instantenous power, and this Gives us insight of both average
and peak condition. For more readable peak or average mesurement, you
cans use peak or average detector circuit.