grind off solder mask to get down to copper
Whats the chemical to take off the solder mask , so i can solder to tiny PCB traces ? I guess some acid that wont harm copper . Im Hacking the connector on a game box "GP2X" . I want my own , more robust connector where all the USB lines are heading off board in same direction . mail is x-x-x-x-WERTY-x-x-x-AT-x-x-x-x-x- x-x-x-x-S_W_I_S_S_I_N_F_O-x-x-x-x- x-x-x-x-ORG-x-x-x-x- BTW im also doin ARM 7 mcu's . Ill hook up a $44 ARM7 with USB as a "peripheral" to control KB and LCD , and pass on important stuff to a central ARM7 . I test code on the first ARM 7 , so the central 7 , can't crash . Central ARM 7 can boot the other in milliseconds . I will use low cost LCD ,BW , $10 from BG Micro . This project is unique , because it will never use text . There will be icons and images on the LCD to show you what is happening . |
grind off solder mask to get down to copper
On 20 Feb, 04:16, "Werty" wrote:
Whats the chemical to take off the solder mask , so i can solder to tiny PCB traces ? metal scourer or blade. I guess some acid that wont harm copper . no such thing NT |
grind off solder mask to get down to copper
wrote in message ups.com... On 20 Feb, 04:16, "Werty" wrote: Whats the chemical to take off the solder mask , so i can solder to tiny PCB traces ? metal scourer or blade. I guess some acid that wont harm copper . no such thing NT I agree with meow. It is very difficult successfully hand soldering to genuinely tiny traces, but I guess it depends what you and I define as " tiny ". I'm talking traces of less than a half milimetre, separated by a similar amount. I always use a scraper to remove the solder resist. I have an Exacto scalpel with a blunt curved blade fitted for the job. I then liberally tin the exposed copper tracks, and then solder-mop them back flat, before soldering the new wires on, using a tiny amount of liquid flux, and the finest gauge solder that you can get. The flux gives serious help with getting the solder to stay *on* the tracks where you want it, rather than flowing *between* them, where you don't ... When I've finished, I usually put a small bead of two-part epoxy in a line across the new conductors, back a short distance from where they are soldered, to offer a bit of mechanical strength, as the tiny tracks will lift if they get the slightest pull from the new wires. Arfa |
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