Vitaliy, What about analogue mux's ? You may have to use something better than the 4051/52/53 series to get a low on resistance though. Otherwise as long as the voltage is within range it should work OK. Maybe parallel up devices to get a lower resistance ? RP On 1 February 2010 17:01, ivp wrote: >> Any other ideas? > > Op-amps ? > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist