Boss Expression Pedal Schematic

Inside the pedal the rocker attaches to a potentiometer that moves proportionally to the pedal. The pedal compresses high input level signals while boosting low input level signals producing a smooth and long sustain without degrading the quality of the original guitar sound. And with two expression outputs you can save further space by controlling two different devices from a single pedal.

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This project pedal is designed to work with any pedal requiring a trs expression pedal.

Boss expression pedal schematic. Here is a list of the schematics that are exclusive to this site. I ll have to make a post about how i did it one day. Expression pedals comprise a pedal assembly that sits on the floor or can be mounted to a pedal board with a rocker that can be moved up and down with the foot. The expression pedal itself however has nothing to do with the voltage range.

We created several and we have redrawn some schematics that were already available on the internet for readability or ease of use these needed an easier to read format corrections or part identifiers. For the classic expression pedal circuit the setup is easy. Many wah pedals use 100k pots instead of the 10k shown in the schematic but the value doesn t matter in most cases. Refer to the schematic in photo 3.

The outputs are electronically isolated eliminating the possibility of noise issues from ground loops. The potentiometer r1 is already in the pedal. But my fc 7 is the same size as a boss pedal now. Here s me rambling on about modifying my roland ev 5 expression pedal with a panel mounted trs jack so that i can use any length of trs cable with it instead of the stock attached cable.

The ev 5 expression pedal is designed for use with keyboards or other expression compatible instruments and devices providing a more dynamic performance. The ev 30 brings powerful real time parameter control to the many boss compact pedals equipped with expression pedal inputs. Boss cs 2 compression sustainer pedal schematic diagram the boss cs 2 compression sustainer effect was sold from december 1981 to june 1986. It will still function the same way.

Fc 7 is a great expression pedal you can also cut it down to be tiny. The way almost every expression pedal out there works is that it takes a reference voltage from the device it s connected to. You can set the minimum volume to the level of your choice thereby determining the maximum effect of the pedal. The timefactor web page states that the expression input is a mono input which would not work so you may want to check with eventide to be sure.

It s only function is to manipulate that range and control the control voltage.