From the trade magazines: Beagle Bone add-ons, DIY 555, using digital scopes

Giant 555Build Your Own Giant 555. This is definitely not practical, but it is fun. It’s educational, too!

BeagleBone: 9 Add-Ons That Power It Past Raspberry Pi. I have a BeagleBone, and while I haven’t played around with it a lot yet, I am liking it. I think it’s a better choice for amateur radio apps than the Raspberry Pi.

How to Use a Digital Oscilloscope. Now that scopes are so cheap, more and more hams have them. They do work differently than analog scopes, and this course will help you use yours better, if you have one.

From my Twitter Feed: Hamvention record, SW radio

N2NKW's avatarN2NKW
@hamvention I sure will if I can get a working radio. Did you know #hamvention in 1960 pressed a 45rpm record? youtube.com/watch?v=lOqe0o…

 

SWLingDotCom's avatarSWLing @SWLingDotCom
Another solution for whole-house shortwave goo.gl/fb/HKiw9#shortwave#swl#dx

 

hackaday's avatarhackaday @hackaday
New post: [Balint]‘s GNU Radio Tutorials bit.ly/1i5LYHv

 

MW0IAN's avatarIan @MW0IAN
XMEGA-A3BU Xplained | AD9850 DDS controller firmware   kd1jv.qrpradio.com/XMEGA/XMEGA.htm

Coiling Cables

A couple of years ago at Field Day, Bruce, KT8TD, tried to show me how to coil cables properly. using the “over-under” technique. Using this technique helps prevent cables from getting all tangled when you uncoil them. I really was too tired at the time to pay much attention, and I never really learned the trick.

Yesterday, though, someone on Twitter posted a link to a Boing Boing post that describes the technique and links to a YouTube video (below) that shows you how to do it. I practiced with some tangled cables I had laying around the shack, and now think that I can coil with the best of them. Try it. It really works.

From my Twitter feed: amateur radio course, SwiftKey, BeagleBone

Radio_2_Radio's avatarRadio Guy @Radio_2_Radio
Amateur Radio: Ken Green's Amateur Radio Course – Clovelly Donkeys ow.ly/2FczP1

f6fvy's avatarLaurent Haas – F6FVY @f6fvy
Typing revolution : SwiftKey for physical keyboards bit.ly/1fkNPq6 #contesting #ohWait

DIYEngineering's avatarDIY Engineering @DIYEngineering
Boost Your BeagleBone Black with Breakout Board – Making a PCB is easier than you might expect. Read more on MAKE ow.ly/2FireZ

From my inbox: radio demos, free EM simulation, radio builder’s BBS

Here are some items of note from my inbox:

  • My partner in crime down at WA2HOM, Ovide, K8EV, is working with Professor Ray, who does science shows for kids down at the Ann Arbor Hands-On Museum, to develop a show about radio. In researching this, Ovide happened across the Happy Scientist’s experiment on AM and FM radio waves. There are a bunch of other interesting experiments on the site, but you have to subscribe to the site, in other words pay, to view them.
  • openEMS is a free and open electromagnetic field solver using the FDTD method. Matlab or Octave are used as an easy and flexible scripting interface. I haven’t yet tried this out, but it sounds like a neat tool to play around with.
  • TheRadioBoard is a forum for the homemade radio builder. There are forums for crystal radio builders, tube radio builders, and solid state radio builders, as well as a swap forum and antenna forum.

From my Twitter feed: bipolar transistors, homebrew Buddipole, Dayton survival

Planet Analog ?@PlanetAnalog 11m
Bipolar Transistor Circuit Design & Analysis, Part 1 – There are many applications for one or two transistors. Th… http://ow.ly/2EzTJR 

 

n1pce's avatarJohn Ryan @n1pce
Homebrew Buddipole with Modifications: youtu.be/Z6ATX2Z9ews via @YouTube

You don’t have to pay a lot for a Buddipole. By making one yourself, you can not only save money, but learn something in the process.

ke9v's avatarJeff Davis @ke9v
Dayton Survival Guide ke9v.net/articles/dayto…

The Dayton Hamvention, still the largest gathering of amateur radio enthusiasts in the world, takes place May 16-18, 2014. While I disagree with Jeff’s statement, “There’s simply no way to facilitate that size of a crowd for three days in an ultra modern facility,” the rest is pretty much spot on.

From my Twitter feeds: Smith chart, inkjet PCBs, SW books

imabug's avatarimabug @imabug
Smith chart antenna-theory.com/tutorial/smith…

 

make's avatarMAKE @make
Inkjet-printed circuits being shown at #sxsw. More to come. pic.twitter.com/ohLNzedwSk

 

hamrad88's avatarTom Stiles @hamrad88
TRRS #0252 – Books for Shortwave Listeners: youtu.be/rBFLkHP8RiU?a via @YouTube

From my Twitter feed: clear-top boxes, SDR, HSMM

LA3ZA's avatarSverre Holm, LA3ZA @LA3ZA
Show off your project in a clear top tin la3za.blogspot.com/2014/02/show-o…

roteno's avatarVictor Laynez @roteno
Fun little radio housing. pic.twitter.com/QtmCw2smuW

DIYEngineering's avatarDIY Engineering @DIYEngineering
Using SDR to Read Your Smart Meter – [BeMasher] was dissatisfied with the cost of other solutions to read his smar… ow.ly/2EcLiT

kc5fm's avatarkc5fm @kc5fm
An Old Buzzard’s Guide to Getting Started with HSMM-Mesh bit.ly/1eL1cQg #ARRL #hamradio

From my Twitter feed: club resources

arrl's avatarARRL @arrl
ARRL Atlantic Division Adds Resources to Aid Amateur Radio Clubs: The ARRL Atlantic Division leadership has cr… bit.ly/1gB2ptw

Atlantic Division director Bill Edgar, N3LLR, is truly one of the directors that knows what he’s doing.

 

qrparci's avatarQRP ARCI @qrparci
The Rockmite is back ! A HF transceiver with built in keyer for $40 – qrpme.com/pages/RM%20][.… #hamr #hamradio #qrp

The Rockmite is a classic. If you haven’t built any kits lately, consider picking up one of these and doing so.

 

AlanAtTek's avatar

Alan Wolke W2AEW @AlanAtTek
Lots of folks liked my “how to test BJTs” video, and asked for a similar one on MOSFETs. Here it is: youtube.com/watch?v=gloikp…Another great W2AEW video. I don’t know how he has time to do these, but they’re certainly worth watching.

From my Twitter feed: weather radio, drones, DMR

TAUTIC's avatarJayson Tautic @TAUTIC
Really cool project! “@chasxmd: Project: Si4707 Weather Radio wp.me/p3oePO-7Q

 

XE2K's avatarJ.Héctor García XE2K @XE2K
After so many Drones in the news, Why not an 160m Vertical wire array supported by Drones ? can be the future?

 

VA3XPR's avatarVA3XPR Repeater @VA3XPR
Teach your local radio club all about Digital Mobile Radio at their next mtg. #hamr #hamradio ow.ly/tkdCb pic.twitter.com/v2cDxOoYdz