Wikipedia Contributions (-2014)

[1] Wikipedia. Dipole antenna. 2012. [ http ]
[2] Wikipedia. Frequency-shift keying. 2012. [ http ]
[3] Wikipedia. Software-defined radio. 2012. [ http ]
[4] Wikipedia. Balun. 2012. [ http ]
[5] Wikipedia. Near vertical incidence skywave. 2012. [ http ]
[6] Wikipedia. Random wire antenna. 2012. [ http ]
[7] Wikipedia. Voacap. 2012. [ http ]
[8] Wikipedia. Sloper antenna. 2012. [ http ]
[9] Wikipedia. Wspr (amateur radio software). 2011. [ http ]
[10] Wikipedia. Chirp transmitter. 2011. [ http ]
[11] Wikipedia. Qrp operation. 2011. [ http ]
[12] Wikipedia. Antenna tuner. 2011. [ http ]
[13] Wikipedia. Plasticity (physics). 2010. [ http ]

Lightify Lampen mit Hue verwenden

Für den Preis einer Hue Lampe sind zwei Lightify Lampen zu haben, doch das Hue System ist verbreiteter… Wie lässt sich eine Lightify Lampe in ein Hue System einbinden?

Die Lightify Lampen (Osram) verwenden, wie auch die Hue Lampen (Philips), das Zigbee Protokoll. Die Implementierungen sind nicht standardisiert, weshalb beispielsweise die Kopplung über Seriennummern oder das vollständige Ausschalten der Lampen dank unterschiedlich realisierter Parameter nicht direkt funktioniert. Die Hersteller sind bemüht die Kompatibilität mit Firmware-Updates sicherzustellen.

So funktioniert das Einbinden der Lightify Lampen:

  1. Falls die Lampen zuvor mit der Hue Bridge gekoppelt waren, dann:
    Reset der Lampen: 5x hintereinander die Lampe jeweils (a) 5 Sekunden an, dann (b) 5 Sekunden aus
  2. Verbinden der Lampen zur Lightify Bridge über die Lightify App
    (Die Bridge wird nur für das Firmware Update benötigt)
  3. Firmware Update der Lampen auf neuste Version durchführen
  4. Reset der Lampen: 5x hintereinander die Lampe jeweils (a) 5 Sekunden an, dann (b) 5 Sekunden aus
  5. Lampen einschalten
  6. In Hue App nach neuen Lampen suchen
    => Die Lampen tauchen auf und lassen sich vollständig ausschalten!

QRP Appliance?

A QRP Appliance comes to live. It contains:

  1. KD1JV Tribander
    1. with speaker mod
    2. power supply mod
  2. Elecraft T1 Tuner
  3. American Morse Paddle
  4. Power Poles

07.03.15 - 1.jpg


Verified All-Band TRX for the Yaesu FT 817 ND

The information available on the web may be misleading: the jumper enumeration is ambiguous and little information on the extended range exists.

I have summarized the information on how to enable all-band TRX on the FT 817 ND in the picture below.

Bild.png


Elecraft T1 ATU in FT 817: Done.

As described in http://www.ngunn.net/cyberworld/hamradio/t1/ I have successfully integrated a T1 tuner into my FT 817. My tuner was sensitive to noise on the 9V rail – using the 12V rail from the data port and some blocking capacitors I finally got the tuner working.evernote-camera-roll-20150207-145037


Hack for Archiving Google Drive

Problem: Archiving of Google Drive documents does not work with the google drive app. Why? Google Drive App stores only links to the cloud (i.e. .gdoc, .gsheet).
Solution: Write a script and use a cron job 🙂


#!/bin/bash
google_drive_dir="/home/my_user_name"
which gdrive >/dev/null || echo "Missing gdrive. Get it here: https://github.com/prasmussen/gdrive"
_archive_filetype ()
{
from=$1
to=$2
find "$google_drive_dir" -name "*.$from" -print0 | while read -d $'\0' file
do
id=$(sed 's/.*"doc_id": "//;s/".*//' "$file")
bd=$(dirname "$file")
cd "$bd"
gdrive download --id $id --format "$to" --force
done
}

_archive_filetype gdoc docx
_archive_filetype gslides pdf
_archive_filetype gsheet xlsx


Connect Morse Key to Iphone

How to connect morse key to an iPhone? Using the buttons on the standard headphones does not work, as the apple interface does not provide low-level access to low-level events like button-down. The idea (R1, R2) will be (1) put a signal to one stereo channel (2) receive the same signal on the input channel (small resistor will simulate mic) (3) detect tone level changes for input channel -> real time-morse (4) put side-tone & co to remaining stereo channel.

Pasted Graphic

  • 1(Tip) – Key (Ground)
  • 2 – Ear (Contact)
  • 3 – Ear (Ground)
  • 4(Ground) – R2(46,6k) – Key 1
  • 4(Ground) – R3(22k) – Key 2
  • 4(Ground) – R1(1k) – 3

I got a prototype running with irmc-ios (R4) and the same physical interface also works with iMorsix (R3).
IMG_0188

(R1) Hijacking Power from […] Audio Interface
(R2) Sources: hijack-main
(R3) App: iMorsix
(R4) App: irmc-ios