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Project Objective: Develop an open source AIS Alarm that alerts sailors that a new marine vessel with AIS is within range   The faceplates came back today and here is a photograph: If I make another order there are a few tweaks I will make but overall I am happy with it.  I might make the holes slightly smaller.  I hit the edge of the PCB with sandpaper where the tabs were and then a sharpie to make it blacker but otherwise it is as received.   Time to finish off the fir ...
*** UPDATED 2nd April 2018 - At bottom - first attempt at soldering QFN *** UPDATED 14 June 2018 - At bottom - second attempt at soldering QFN - FAIL *** UPDATED 16 June 2018 - At bottom - third attempt it's alive!  See bottom of post for what was wrong and how it was repaired   For sometime I have been using the Texas Instruments MSP430G2553 in most of my projects.  It is relatively inexpensive at $1.98 in small quantities, comes in DIP and TSSOP packages that can be hand sold ...
Project Objective: Develop an open source AIS Alarm that alerts sailors that a new marine vessel with AIS is within range   Two boards have been populated and tested now and everything seems to be working.  This update will cover thoughts on the PCB, faceplate design for the enclosure, and an update on the firmware.   I am satisfied with the PCB for the most part now but will decrease the drill hole size for the LED as the fit is a little loose.  Three different buzzers were ...