Tone control - Graphic Equaliser

Four shape-controls portable unit
Wide variety of output waveforms
Compared to common Fuzz-box devices, the Sound Modifier circuit allows a choice amongst a wide variety of output waveforms, thanks to its capability of mixing three different modified versions of the input signal.
This stand alone unit, primarily intended for electric guitars, is based on a low power quad [...]

Many times we needed to use a simple circuit of preamplifier, with few components and facility of made. This circuit use a opamp. the Motorola, TCA5550, that contains a double amplifier, as outputs for the adjust of volume, balance, treble and bass. These adjustment of all parameters become from a line monophonic linear potesometers, increasing [...]

For simplicity, I’ve used the LM1036 tone/volume/balance chip to do this part of the mixer. The circuit is straight out of the LM1036 datasheet. In my mixer, I disabled the balance input by using a pair of fixed resistors to give it a DC voltage of VCC/2 Using the LM1036 may seem like laziness or [...]