2006/7/6, Tony Harris : > > Thank you!! That is it!! As I am slowly playing with FPGA as well, I discovered that it is called a "delta sigma" DAC there. There is an application note, http://direct.xilinx.com/bvdocs/appnotes/xapp154.pdf that describes the details. This is of course not something that is easily implemented in a PICmicro, but some of the ideas could possibly be converted and used. According to the document you can basically create the equivalent of an n-bit DAC, based on speed at which you send out the data. Greetings, Maarten Hofman. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist