2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101631We present a prescription for generating pure spin current or spin selective current, based on adiabatic quantum pumping in a tight-binding model of a one dimensional conductor. A formula for the instantaneous pumped current is derived without introducing the scattering matrix. Our calculations indicate that some pumping cycles produce the maximum value 2 of pumped spin while others reverse the direction of current as a result of small alterations of the pumping cycle. We find pumping cycles which produce essentially any ratio of spin current to charge current.8 pages, 7 figures, to be published in PRBMesoscale and Nanoscale Physicstext