Designing optimized survey layouts for DC resistivity data is a difficult task. This is primarily due to the non-linear relationship between observed data and the subsurface resistivity structure. A possible solution is provided by real-time experimental design, a novel approach for acquiring geophysical data. Technical realization of real-time experimental design requires versatile recording facilities. We have developed a new multi-electrode system, that offers the necessary flexibility. Furthermore, our concept of distributed acquisition units with a digital layout enables the recording of high quality data.