Fidel Salinas    5th Jun 2014   

A little step by step SMD soldering: The purpose of this board is to allow USB devices to be written in host-side Python so that one workstation can fuzz-test the USB device drivers of another host. There are also a ton of other cool things you can do with your own Python scripts. First I picked all the big components; 2 Mini USB females, 1 FT232RL(SSOP28), 1 MSP430F2618TPM(QFP64), MAX3420E(LQFP32) and a 12MHz SMD Crystal. Next I added a bit of flux to the board to help stop bridging. The first componets I soldered are the Mini USBs starting with the outside tabs then the data connetions. Next on the list is the MSP430 using a one sided chiseled tip and the drag method. Be careful not too use to much solder! I hold the chip down with some non-conductive plastic wire twisters to center and tack one side. Now for the FTDI! Using the same method but less pins makes it much easier. Now for the Max; same method but even easier then the last two ICs - Next the 12Mhz crystal - now use a magnifying glass to make sure there are no bridges. It's time for the 0630 parts 2 1.0uF Capacitors, 3 0.1uF decoupling capacitors, 2 18pF Capacitors, 2 330ohm LED resistors, and 3 LEDS. I used non conductive tweezers and just a tack of solder for the caps and LEDs Once everyhing is soldered on give it a look under a magnifying glass If everything looks good, connect it and the LEDs should blink, then go to the site above to load the firmware and have some fun. I hope you enjoyed my post. when the headers I ordered come in I'll post a video of soldering them on the Freescale FRM-KL25Z Freedom.



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