doepfer fp5 foot controller price : $75.00

about 1m cable length, stereo jack plug 1/4", potentiometer 10k linear (suitable e.g. for lmk4+/2+ or a-177)

dimensions:
overall: ~ 25 x 12 x 11 cm (down position) resp. 25 x 12 x 15 cm (up position)
pin out of the stereo jack plug:
left (ccw) terminal of the potentiometer = gnd terminal of the jack plug middle terminal (wiper) of the potentiometers = ring of the jack plug right (cw) terminal of the potentiometer = tip of the jack plug

pay attention that not the full rotating angle of the potentiometer is covered but only about 50%. if the end terminals of the potentiometer are e.g. connected to gnd and +5v only a voltange range 0...+2.5v is covered! of course the foot control inputs of our keyboards take this special behaviour into consideration but e.g. for diy/oem applications one has to pay attention to the limited rotating angle.