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In this way, the adjustment of R5 will be made easier. On the contrary, if the circuit will be used to detect only very low peak-to-peak voltages, it is convenient to lower R1 value to, say, 220K omitting C2. If you need to detect higher output peak-to-peak voltages, R1 value must be raised. With the values shown, the circuit can be easily set up to detect sine wave clipping from less than 1V to 30V peak-to-peak (i.e.C5 adds a small output delay in order to allow detection of very short peaks.
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CLIPPING DETECTOR LED CIRCUIT DRIVER
The op-amps outputs are mixed by D1 and D2, smoothed by C4, R7 and R8, and feed the LED driver Q1 with a positive pulse. This technique allows to detect precisely and symmetrically either the positive or negative peak value reached by the monitored signal. The heart of the audio clipping circuit is a window comparator formed by two op-amps packaged into IC1. The power supply can also be obtained from higher voltage rails provided suitable R/C cells are inserted. Obviously, the unit can be embedded into an existing mixer, preamp or power amplifier, and powered by the internal supply rails in the 9 – 30V range.
CLIPPING DETECTOR LED CIRCUIT GENERATOR
Unfortunately, an oscilloscope and a sine wave frequency generator are required to accurately setup this circuit. A careful setting of Trimmer R5 will allow triggering of the LED with a wide range of peak-to-peak input voltages, in order to suit different requirements. This unit is particularly useful in signaling overload of the input stages in mixers, PA or musical instruments amplification chains, but is also suited to power amplifiers. This will help the operator in avoiding extreme twisting or distortion in the audio to be created through the sound hardware chain, as if it were shielding your amplifier equipments and speakers from over-loading. is coming to the onset of its maximum permitted peak voltage value before an over-load is happening. It can be utilized as a different, convenient unit, to signal by using some LEDs when the output wave form a specific sound stage is "cutting" i.e. This Simple Audio Clipping Peak Indicator circuit was expected to distinguish clipping in preamp stages, mixers, equalizer, amplifiers and so on.