Skip to main content

Week Notes: TouCans and Other Birds, Power Cycling, Soft Keys, and Night Ops

 TouCans continues to fly on its own! We need to work through the bluetooth transmitter turning itself off to save power. We also need to work through strategies to extend battery life with the Pico-W. At the moment, I'm looking into the MicroPython machine.lightsleep method. It looks like I can suspend operation of the Pico-W for a set amount of time after which it will automatically wake back up. This might be particularly handy for camping expeditions where I could essentially snooze the rig while I snooze. 

Work continues on the straight key via WiFi for the rig.

Yesterday I hauled the rig around with me all over Lands End hoping for a chance to set up a POTA. It didn't happen, but I did find out that the rig travels well. No issues at all when I reinstalled it in the backyard.

As far as kinda cool pictures of the rig for the week, I managed to capture it framed between an almost full moon and Orion


It appears that the local aviary life think that TouCans was more than an apt name the rig. While wind testing the rig last week, I noticed a bird fly through the video, behind the rig. I've been learning ffmpeg over the last few weeks, and this was a really cool result!


1
2
3
4
Tuna Topper RF Out
5
Tuna Topper RF Out
6
Tuna Topper RF Out
7
bird frame 7
8
Tuna Topper RF Out
9
Tuna Topper RF Out
10
Tuna Topper RF Out
11
Tuna Topper RF Out
12
Tuna Topper RF Out
13
Tuna Topper RF Out
14
Tuna Topper RF Out
15
Tuna Topper RF Out
16




Comments

Popular posts from this blog

More Cowbell! Record Production using Google Forms and Charts

First, the what : This article shows how to embed a new Google Form into any web page. To demonstrate ths, a chart and form that allow blog readers to control the recording levels of each instrument in Blue Oyster Cult's "(Don't Fear) The Reaper" is used. HTML code from the Google version of the form included on this page is shown and the parts that need to be modified are highlighted. Next, the why : Google recently released an e-mail form feature that allows users of Google Documents to create an e-mail a form that automatically places each user's input into an associated spreadsheet. As it turns out, with a little bit of work, the forms that are created by Google Docs can be embedded into any web page. Now, The Goods: Click on the instrument you want turned up, click the submit button and then refresh the page. Through the magic of Google Forms as soon as you click on submit and refresh this web page, the data chart will update immediately. Turn up the:

Cool Math Tricks: Deriving the Divergence, (Del or Nabla) into New (Cylindrical) Coordinate Systems

Now available as a Kindle ebook for 99 cents ! Get a spiffy ebook, and fund more physics The following is a pretty lengthy procedure, but converting the divergence, (nabla, del) operator between coordinate systems comes up pretty often. While there are tables for converting between common coordinate systems , there seem to be fewer explanations of the procedure for deriving the conversion, so here goes! What do we actually want? To convert the Cartesian nabla to the nabla for another coordinate system, say… cylindrical coordinates. What we’ll need: 1. The Cartesian Nabla: 2. A set of equations relating the Cartesian coordinates to cylindrical coordinates: 3. A set of equations relating the Cartesian basis vectors to the basis vectors of the new coordinate system: How to do it: Use the chain rule for differentiation to convert the derivatives with respect to the Cartesian variables to derivatives with respect to the cylindrical variables. The chain

The Valentine's Day Magnetic Monopole

There's an assymetry to the form of the two Maxwell's equations shown in picture 1.  While the divergence of the electric field is proportional to the electric charge density at a given point, the divergence of the magnetic field is equal to zero.  This is typically explained in the following way.  While we know that electrons, the fundamental electric charge carriers exist, evidence seems to indicate that magnetic monopoles, the particles that would carry magnetic 'charge', either don't exist, or, the energies required to create them are so high that they are exceedingly rare.  That doesn't stop us from looking for them though! Keeping with the theme of Fairbank[1] and his academic progeny over the semester break, today's post is about the discovery of a magnetic monopole candidate event by one of the Fairbank's graduate students, Blas Cabrera[2].  Cabrera was utilizing a loop type of magnetic monopole detector.  Its operation is in concept very sim