I remember saw one like, is this correct and good? is all DAC chips = need negative power supply??? signal pin 20k 20k D0 2 >---###-+-###--0v 20k # 10k D1 3 >---###-| 20k # 10k D2 4 >---###-| 20k # 10k D3 5 >---###-| 20k # 10k D4 6 >---###-| 20k # 10k D5 7 >---###-| 20k # 10k D6 8 >---###-| 20k # 10k D7 9 >---###-| # 10k 10uF +-------][----> To amplifier # 10k GND 20 >-------+-------------> 0v Paul Xu, Plasma Jet Ltd. 18 Elm Grove Ave., Unit B2 Toronto, ON m6k2j1 416 5880955 gxu@cc.hut.fi, gxu15@aicompro.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.