Design
Designing amplifiers or effects is a long process.
It aims to respond to a problem for which there is no solution in the trade. This problem will make us decide the nature of the device that we will design (amplifier, effect pedal of the timbre or time type) to determine its amplification, its saturation, its frequency response, its texture, its amplitude ....
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You can start from scratch (by drawing a new schematic) or from an already existing schematic base to which you will make changes (adding/removing floors, correcting equalization, clipping, _cc781905-5cde- 3194-bb3b-136bad5cf58d_de spacialisation..). Here, we are not afraid to scrape pages of equations because despite the precious time it requires, it is essential to obtain a stable and efficient circuit.
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In a second step, when the theoretical diagram is ready, we can proceed to virtual simulations using dedicated software which will allow us to make a whole series of current and voltage measurements on the whole circuit (simulated ) as well as to define its frequency response (still in simulation).
Let's take the example of a very simple and famous functional overdrive schematic:
When the simulation meets our expectations, we can move on to the prototyping phase, often on veroboard (soldered on a prototyping circuit) or on breadboard (without soldering):
Sometimes, we also have the pleasure of making a traditional circuit from a copper epoxy fiber plate: make an artwork, transfer it to the copper in order to mask the tracks that we want to keep and dip everything in the perchloride iron or sodium in order to dissolve the rest of the copper and preserve our tracks. Finally, all that remains is to clean the transfer and pass the board with chemical tin to protect it and facilitate soldering.
Here is an example for a reproduction of Diaz Square Face fuzz circuits:
Next, it's time to physically test the circuit:
Signal analysis:
The Low Frequency Generator provides a signal which is transformed by our new circuit and then read by the oscilloscope in order to interpret it:
Dynamic frequency response analysis:
We generate a white or pink noise that we inject into the circuit and software instantly displays its frequency response, which makes it possible to control the action of the potentiometers live, for example. Illustrative photo and video:
Finally, it is possible to play with the prototype as much as possible, to discover the musical sensations, to repeat the previous stages of development if modifications are necessary until the circuit corresponds perfectly to our requirements of sound but also of quality. and reliability.
On va pouvoir passer à l'étape de la _cc781905-5cde-3194 -bb3b-136bad5cf58d_ _cc781905 -5cde-3194-bb3b-136bad5cf58d_