New POES Receiver Setup

For the last few years I have off and on run a receiver dedicated to picking up the image transmissions from NOAA’s POES series of satellites.

The POES satellites are polar orbiting weather satellites that transmit image data down, and are available to anyone who cares to set up a station.

In the past, I have used a receiver I built as a kit, and it worked alright, but getting good performance out of it has been troublesome, so the images often had issues with noise, or not faithfully reproducing the actual data the satellites were sending.

I was working on getting my station tuned up again recently, and decided to try using a USB SDR (Software Defined Radio) attached to a Raspberry Pi, to see if I could get better results, and I have to say I’m pleased with the answer.

The first image is just contrast enhanced, and the map overlay was placed on, the second is a false color enhancement that helps show clouds.

Posted in Ham Radio, Weather | Leave a comment

K7NVH PoE PDU

A little while ago, I posted about using surface mount stencils for the first time on a new project. I’ve been able to get a couple of the units completed, and with some help from a friend with milling the front panel of the case, the units are looking really nice.

This is a PDU based on my earlier design, but modified to better support PoE (Power over Ethernet) devices. The ports are designed as a passthrough, so one port will connect to your switch, the other will connect to the device and receive power. It’s designed to support gigabit connectivity, and handle PoE+ loads.

This new revision makes the project much more valuable for the HamWAN project on our remote sites, where all of our equipment is PoE.

Posted in Electronics, Projects, Technology | Leave a comment

Cheap Wall Rack

After putting together the ESD protection bar for my PoE devices, I decided that I wanted to reduce the number of ethernet runs I had strung across the garage, so I took some scrap bits of lumber, and made a small, wall mount rack, to put a switch, and my PoE PDU into.

I also took the opportunity to change the uplink to the switch to fiber, to further electrically isolate my outdoor PoE devices from my main server cabinet and network gear.

As an additional bonus, now I can remotely power cycle any of the PoE devices via the PDU in case of an issue.

Posted in Electronics, Projects, Technology | Leave a comment

2017 Balloon Launch

This last weekend I went over with the class from UW and helped out with the annual high altitude balloon launch. I flew a position tracking payload, as well as a camera that got some pretty nice photos. Check out more on the project page here: 2017 Launch

Posted in Electronics, Projects, Weather | Leave a comment

Basic ESD Protection

A recent thunderstorm that came through the area reminded me that I needed to work on some improvements to my surge suppression systems. I have a number of outdoor ethernet devices like security cameras with rather long runs of cable outside, and I’d hate to have a surge come through and damage my main switch.

There are a number of options in terms of ethernet surge supression, and I found a name brand at a cheap price in the Ubiquiti devices. Amazon had them to me a couple days later, and I mounted them onto a 1″ square aluminum tube. The tube is then grounded to a rod outside. The whole thing is mounted in my garage right where the ethernet runs enter the house.

It’s a simple setup that didn’t take long to put together, and adds a little peace of mind for the next time a thunderstorm rolls through.

Posted in Electronics, Technology, Weather | Leave a comment