In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote: Yes, but parasitic power comes from the DQ line when you don't have +5V available at the device. The diodes and cap are built into the device, you just leave Vdd unconnected. Bean. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=192587#m192597 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)