Does anyone know how the Line 6 expression/volume pedals operate in the Floorboard that works with the original POD?
It looks as if Line 6 uses a hinged pedal that transitions some sort of plastic or film band up and down. A light sensor/reflectometer perhaps? Magnetic sensor?
I am working on a project where I would like to have a foot controlled expression signal. I need to eventually convert the expression information into a digital signal, so the first obvious approach I thought of is to use an ADC, apply a voltage across a pot in an old wah or volume pedal and sample the wiper.
I already have the ADC in line (its built into a AVR microcontroller that is the heart of the project), so that may be the route I go, but I wanted to explore as many alternatives as I can.
Any other ideas as to how to create reliable and predicatble (foot operated) variable signal suitable for sampling?
Thanks in advance
most probably a LDR-LED combination
(yes, and some ADC)