Boss SD-1 Super OverDrive guitar pedal schematic diagram


Posted on Feb 5, 2014

The Boss SD-1 Super OverDrive is a pedal with a simple design, using only one dual operational amplifier (uPC4558C) and 6 transistors, with an asymmetric overdrive circuitry for a classic, natural tube amp growl. It generates the warm distortion of an overdriven tube amplifier while maintaining the subtle nuances of a guitar player`s picking techn


Boss SD-1 Super OverDrive guitar pedal schematic diagram
Click here to download the full size of the above Circuit.

ique. The schematic is nearly identical to the classic OD-1 OverDrive, the only major difference is the tone control circuit. The design is simple and easy to follow: the guitar signal is buffered with Q5 and enters the first half of the uPC4558C dual operational amplifier. There are 3 silicon diodes in the negative feedback path of the op-amp. Two diodes are in one direction and only one in the other. This arrangement produces asymmetrical soft clipping - one side of the waveform is clipped more severely than the other. The tone corrector and level control circuits are next. The signal finally exits the circuit after the output buffer made with Q6. The bypass circuit uses a classic arrangement with 2 JFETs (Q1 and Q2) serving as solid-state switches and a symmetrical bistable multivibrator made with Q3 and Q4.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Motor Speed Controller
    Analysis of a Digitally Controlled Wien Bridge Oscillator
    Early VDO Tachometer Guts
    400w mosfet amplifier circuit schematic
    tv restoration
    IrDA Interface
    Discrete Voltage Inverter
    An Intel 8088 Maximum Mode Single Board Computer System
    Advanced Simulation for ESD Protection Elements
    Peak Detector Circuit
    4 ~ 20mA transmitter circuit diagram TMP35 temperature
    No linear feedback amplifier circuit a



    Top