Toby, in the first years of '70, in IBM, we use wire wrapping also for larger mainframes. Boards have six layers of printed circuit and two layers of wire wrapping. Wire wrapping is usefull for prototyping, but very expensive for production. Try two way: a. make your double sided pcb using less vias you can or trying to put vias under IC sockets pins or components and solder pins for both sides. b. use wirewrapp TEFLON wire and solder directly to IC and components pins on a prototype perf board. If you want to use wire wrapping use prototype perf board with or without soldering pads, but not the bussed one like veroboard. To fix IC sockets use a drop of glue on perf board without pads or solder the four corner pads on the other. Use 28 or 30 AWG wire silver copper for wire wrapping. HTH LMK ciao Claudio Rachiele IW0DZG PICLIST@MITVMA.MIT.EDU 01/19/99 07:18 PM Please respond to PICLIST@MITVMA.MIT.EDU To: PICLIST@MITVMA.MIT.EDU cc: Subject: [OT] Wire wrapping questions I can't find any instructions concerning wire wrapping, and I have a few questions, and any general tips or hints would be welcome: Generally I make small quantity (<5) PIC based circuits with just a few other ICs and a few discreets. Is wire wrapping the way to go? Is there a web page or book with instructions for wire wrapping? Do I need to buy a special type of perf board? What holds the sockets in the perf board? We are thinking about buying the OK battery powered wrapping tool, any experience or reviews? What gauge wire should I use for typical PIC circuits? Toby Stensland toby@stensland.com 3112 South Independence Court Lakewood, CO 80227 www.stensland.com