Low Pass Filter Board

So I figured for my stacker transceiver project that I would start with the transmitter. First cab out of the rank will be the low pass filters to test out and ensure that my board design is working as it should be. Added in the switching bits to start with and jumpered out the coupling capacitor links used in band pass filters. I have even ordered NP0 monilithic caps for these and should have them in a couple of days and have this built and tested by friday.

The three filters will be for 80, 40 and 20 meter bands using 7th order Butterworth derived filters. Probably overkill for my transmitter design and power, but hey if you got em roll em.

Facebooktwittergoogle_plusredditpinterestlinkedin

VK4FFAB Arduino Logger TFT Edition

So after procrastinating about this for such a long time I finally got around to porting the code over to make it work with the 3.2 inch TFT Display. And seeing as it was pretty much a huge code rewrite, while i was there I added in come new functionality to improve usability. All input functions will now accept the <BACKSPACE> key to erase mistakes. Still to be done, create and use a new logfile and add in some WWFF specific items like park to park and my park details. All in all I am rather please with how this has come along. Each time I spend some time on it, it comes out much more improved.

Arduino Logger TFT Edition Code: TFT_Arduino_logger

 

Here is a break down of the stack. 3.2inch TFT on the top, followed by the MEGA2560 and underneath it, the shield board with sd card, real time clock and ps2 keyboard interface. Not my cleanest work, but much cleaner than the last build LOL.

And this is the log file data from the video below. Nice clean ADIF that should by rights allow for importing into any other logging application.

And here is a video of the thing in action. Next on the agenda is boxing it up with a 5000mah single cell Liop, charge controller, BMS and Boost converter to make 5 volts, then add in the new code features and this choocher should be awesome as frig.

Facebooktwittergoogle_plusredditpinterestlinkedin