Switch with at least one flexible conductive member

A switch (10) comprises first and second substrates (14, 20) with conductive surfaces, the conductive surfaces being optionally the conductive surfaces of conductive layers (16, 22), opposed to each other across a gap. The first substrate (14) is flexible and comprises an intrinsically conductive substituted or unsubstituted polythiophene, optionally as a conductive coating (16). The switch may complete an electrical circuit comprising wires (28, 30) when one of substrates is pressed toward the other of the substrates and the two conductive surfaces touch. The polarity applied to the intrinsically conductive substituted or unsubstituted polythiophene surface is preferably negative. The voltage applied to the electrical circuit is preferably less than five volts; more preferably, the voltage applied to the electrical circuit is less than three volts; even more preferably, the voltage applied to the electrical circuit is less than one volt.