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3 Channel Spectrum Analyzer
This 3 channel 15 LED spectrum analyzer is the perfect addition to any audio amp project
---295
Audio VU Meter
This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores.
---440
Instrument Graphic Equaliser
Designed especially as a guitar / bass equaliser, this unit is expandable
---227
LED VU Meter
Standard LED VU meter, includes simple rectifier circuit for full wave detection
---224
PPM and VU Meter
A versatile and useful VU meter circuit, can also operate as a Peak Program Meter
---220
Subwoofer Graphic Equaliser
This is a constant Q design, eight 1/3 octave bands covering 20Hz to 100Hz.
---245
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