Amplifier Circuit Diagrams


Overdrive Distortion Effect Circuit Designed specifically for use with guitar. Circuit NE5532 There is no critical material on the opamp installed circuit. All of them can be found on the market. Also box, PCB is very stylish in printed circuit design. Distortion effect circuit has low current consumption and works with 9v battery. Drive, Tone, Level, Hard-Soft-Bypass settings can be made on the circuit. Distortion overdrive effect circuit diagram, pcb, box label etc. all the drawings and the material list … Finally, the author has prepared this circuit published in the popular electronic magazine of the country.

Guitar Distortion Effect, Distortion + Effect Designed by Keith Barr (MXR Innovations) in the early 1970s, and since then has an important place in the history of music. This effect was used by guitar legends such as Randy Rhoads, Bob Mold, and a special guitar voice, found in the records of the last 40 years.

Both the distortion effect and the overdrive effect are sometimes referred to simply as “distortion” because the principle of their operation is the same, they differ only before and after the amplitude limiter in different filters of the signal and in the number of nonlinear distortions included in the signal.

The system described here is very simple in design and is based on a pair of opamps and a group of separate elements. Silicon diodes are used to cut off the signal, not the germanium diodes as they were originally. The system can perform soft clipping overload and hard clipping (distortion) effects, as well as adjustable cut level, tone and volume control. At the same time, there is a switch that allows you to bypass the distortion (bypass) and enter the signal directly from the amplifier.



Signal clipping: The effects of overdrive and distortion are dependent on the correct clipping of the guitar signal. Cropping is a nonlinear process that produces harmonic frequencies that are not normally found in the audio signal. When the clean signal consists of two rising and falling phases, the effect described here provides more grip.

The duration depends on the overload or distortion overload condition: the longer the cutoff threshold value is, the higher the signal level is before the cutoff. This situation is presented below. The signal is interrupted only after a certain threshold voltage has risen. Under this threshold, the signal will not experience any distortion – you can hear the original sound as if the effect were turned off.

If the string is pulled harder, the signal exceeds the threshold and is constrained, it changes more rectangularly, but remains “rounded” at the corners ( soft clipping ). The signal is heard as the sum of the harmonics and contains more of the more rectangular signal. As a result, the change in signal shape is perceived as the addition of higher harmonics, the sound becomes sharper. The overdrive effect is softer than distortion, which has a sharper and more metallic case. The truncation of the distortion is more severe (hard clipping), the “flat” parts of the waveform appear. The cut threshold is set just before or at the signal intensification phase when a higher gain is obtained.

On the circuit: You can use the TL072 instead of the NE5532 opamp. If the tone setting ( high tone cut ) is insufficient, you can change the value of the C11 4.7nF capacitor. The use of a larger capacitor allows, for example, 6.8nF to pass through smaller, e.g., 3.3nF, higher frequencies, resulting in stronger clipping. The VB sections that appear on the circuit board are assembled in the PCB drawing. If you are going to install a perforated plate or rebuild the PCB, all sections that write VB will be combined.



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