https://specialcomp.com/beaglebone/
On Sun, Mar 22, 2015 at 9:36 PM, Claud Xiao <[email protected]> wrote: > Hi, > > I tried to solder ARM20cTI20 JTAG connectors with Element14’s BBB but > failed, twice (hence two boards broken). After some investigations, I think > it’s not my fault but is manufacturer’s problem. *Element14’s version and > CircuitCo’s version are really different in this issue. * > > As you may know, BBB hasn’t JTAG interface on board unless you manually > solder an extra ARM20cTI20 connector to its P2. There’re some tutorials on > how to do that: > http://www.tincantools.com/wiki/Flyswatter2_BeagleBone_Black_How_To > https://www.youtube.com/watch?v=7JmHn7aN2FU > > I have lot of experiences in soldering and never failed before. But this > time is different. Although I strictly followed these tutorials, no matter > how long I keep the soldering iron on the connector’s pins to heat adherent > solder, the solder on the pin will never glue with the P2. I tried many > times and some other methods (even with different kinds of solder irons) > but stilled no success. I also tried to directly paste some solder to P2 > but it’s pretty hard to adhere to. Some solder even became sphere other > than adhere the bottom pins. Anyway, now two boards’ P2 were destroyed > while two ARM20cTI20 connectors was consumed away. > > After carefully compare images/video in tutorials with the boards I have, > I found the main difference is, there isn’t any solder covered P2 pins in > my boards. > > Let’s take a look at Adafruit’s pictures on BBB: > CircuitCo’s version: http://www.adafruit.com/products/1876 (out of stock) > Element14’s version: http://www.adafruit.com/products/1996 > > And in SeeedStudio: > CircuitCo’s version: > http://www.seeedstudio.com/depot/BeagleBone-Black-p-1505.html (not rev C) > Element14’s version: > http://www.seeedstudio.com/depot/Embest-BeagleBone-Black-RevC-Singleboard-Computer-p-1860.html > > Take a look at P2 on the back of the board. There’s a huge difference that > CircuitCo’s P2 pins are covered by solder while Element14’s are not. Note > that all tutorials used CircuitCo’s version. I also highly doubt > Element14’s pins are covered by some solder mask which prevent the solder’s > adherent. > > My question is, > > 1) Is there anyone who successfully soldered it on Element14’s BBB before? > If you are, how do you achieve that? > > 2) *Is there any way to buy CircuitCo’s BBB rev C?* At least Amazon, > Adafruit, SeeedStudio, Sparkfun are not. MakerShed’s picture is CircuitCo’s > but it hasn’t any manufacturer information. Consider that Sparkfun’s > picture is also CircuitCo’s but their products are Element14’s, I don’t > think picture is trustworthy. > > Thanks your guys! > - Claud > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
