2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/25824A simple electronic circuit is described using four common and very inexpensive analog multiplexer/demultiplexer chips. These analog switches are used to select eight different wiring configurations to a van der Pauw sample. Several interfacing schemes to a PC are suggested. The van der Pauw resistivity and Hall voltage expressions are also summarized.Other Condensed Mattertext