Saturday, March 26, 2016

Adafruit OLED display on Arduino

I have been neglecting my Arduino interests in favor of amateur radio recently. So, I bought a book "Arduino for Ham Radio."

One simple project to get me started is a compass display.  The book call for a LCD module, which I have, but I also have an +Adafruit Industries OLED 128X64 display that I haven used yet.  So, I dug it out, soldered on the header pins, downloaded the Adafruit libraries, and uploaded an example to an +Arduino Uno clone that I had lying around.  I'm now sensitive to clones, and from now on will only by genuine Arduinos, but since I had this one I used it.

I made one small change to the program, just for grins:  changed "Hello World" to "Hello Town" and passed that message as a variable rather than a literal. No big deal, but I'm refreshing my Arduino skills.

I have ordered the compass module--after I get it I'll finish the project and post results here.

Here's a video.

Sunday, March 13, 2016

J-Pole on the house, base station set up

The J-Pole antenna I built (see this post) is now mounted on the house to serve as my permanent antenna for 2 meters.  We sealed the coax connections with electrical tape and soldered the crosspiece with the SO-239 connector to each of the antenna elements to make a permanent electrical connection.  The RG-58 coax is connected to a lightning arrestor, and then to another piece of coax via a female-female adapter. Those connections are wrapped with electrical tape, and the coax goes through a hole in the singles and wall into the area above a drop ceiling in my basement, then down the wall and under my desk  to my new base station radio (Yaesu FT-1900R, with a 13.8V power supply). The lightning arrestor is connected to a 10ft ground rod, driven into the ground, via #12AWG wire.

It works great!

Next steps: finish studying for my general class license. pass the test, by an HF rig, put up a multiband dipole antenna, and expand my ham horizons.