First Batch Rev D1 Build

[kb1lqc]

First Batch Boards

We've already brought up the first of twelve boards on #46 so here are the next 11! Order of building these units will be the same as the first being SMA connector, GPS, and finally Power/MOSFET connectors. None of them will initially get a JTAG connector but they may eventually. Finally I will use prebuilt binaries to update the firmware of the CC430 via USB.

[kb1lqc]

Just finised placing and soldering all 11 SMA connectors with hand-placed solder paste and reflow. This took about 54 minutes so 4.9 minutes per board.

[kb1lqc]

I'll make a second Issue Ticket and post images but 2/11 boards have some poor solders on U1, the CC430F6137. It appears there was too much solder and some pads balled up or flowed between each other. Good to note so any manufacturing tweeks can be made to prevent this!

• Create Issue Ticket with images for U1 solder quality

[kb1lqc]

Installing five GPS units took 30 minutes with a littler rework after reflow. This turned out to be about 6 minutes per board. Largely due to too much solderpaste resulting in the need to remove solder from most of the 28 pins per GPS which was time consuming.

[kb1lqc]

Installing 22 power/mosfet connectors on 11 boards took 15 minutes. This equates to 41 seconds per connector or 1:21 per board.

[kb1lqc]

Cleaning boards after soldering took about 20 minutes for 11 boards which equals about 1:50 per board.

[kb1lqc]

Plugged first unit in, SN2, and it appears as COM11. Reprogrammed with FTDI PRog and it's now COM12.

Needed to program with FT-PROG

• Set max power to 500mA
• Set CBUS configuration to all GPIO

Programmed firmware on via python autouploader and LED's appear to boot on fine.

[kb1lqc]

Took roughly 35 minutes to program 11 units with the autoupdater script and FT-PROG

[kb1lqc]

SN 8 just got a GPS lock, SN 11 also connected after being left for a while turned on.

[kb1lqc]

While I haven't extensively tested these I think it's safe to say that for the most part they appear to work.