In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Tinker wrote: Try these out, I've been using them on a regular basis for quite a while on projects around the house and at work. Just recently picked up my first set of sx supplies but I was succesful in printing and mounting for the SX/48 which is the smaller of the 2 packages using a decent cad package, ink jet printer, transparencys and photo etch boards. I expose under a 50 watt halogen desk lamp 6" away for 12 minutes and make sure your developer is warm, seems to help. It takes a little while to get used to but they give great results. For putting the chip down, I pre tin the pads with Kester rosin core, remove solder with solder solder wick, remove flux with alchahol. This leaves a very light "film" of solder sufficient to "tack" the sx on a few leads. The last steps are to go back, add solder using a fine tippped iron, then I apply a 50% alchahol diluted mixture of of kester acid flux and reheat with the iron. The solder flows out great leaving a nice clean well soldered chip install. Last step is to very thouroughly flush and brush the acid flux away. Usually several cleanings with alchohol. It sounds very drawn out and complicated but with a little practice you can apply a 48 package in 10 minutes or so. investment cost is minimal and for me its been a great way to come up with very clean prototypes. The boards can be found here, price is reasonable, only part of the system that seems wasteful to me is the developer as it loses potency rather quickly once mixed. Boards [url=http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=055-108]http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=055-108[/url] Developer [url=http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=340-144]http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=340-144[/url] Radio shack sells the etchant. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=86586#m90800 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2005 (http://www.dotNetBB.com)