Lloyd's Demos
Lloyd's Demos
  • Видео 31
  • Просмотров 92 501
Labor Day 2024
Between 5 AM and 7 PM (US Eastern Daylight Time), 28 'full disk' images were received from GOES-16. The 1-1/2 minute clip displays these photos at 3 seconds each showing the progress of daylight over the western hemisphere. Music track: Also Sprach Zarathustra by Richard Strauss; Henry Lewis; The Royal Philharmonic Orchestra London Records (SPC 21053) 1970.
Просмотров: 38

Видео

My GOES Setup
Просмотров 824 месяца назад
Receive images and data from the NOAA GOES-16 geostationary satellite. The accompanying write-up at www.lloydm.net/Demos/GOES.html has more details about this compact setup. 73, -Lloyd (wa4efs)
QMX IQ mode
Просмотров 1,6 тыс.9 месяцев назад
The beautiful little QRP Labs QMX transceiver includes an IQ mode option. This video shows the QMX with SDR . In addition to IQ mode we also test CAT to rig control using a homebrew interface. Additional details, including a source code link and additional video links may be found at: www.lloydm.net/Demos/QMX_Interface.html Just for fun. 73, WA4EFS
Buck-Boost converters
Просмотров 1309 месяцев назад
Non-technical explanation and demonstration of DC-to-DC voltage conversion. Additional details may be found at www.lloydm.net/Demos/BuckBoost.html. 73, -Lloyd (WA4EFS)
Simple Serial to WiFi Interface
Просмотров 208Год назад
Interface a serial COM port to WiFi (UDP) or USB virtual serial for file transfer from an old DOS computer to a modern Windows or Linux computer or a DOS virtual machine. See lloydm.net/Demos/DOS2UDP.html for additional details, including microcontroller sketch and Python listener code.
Low Power SWR Meter
Просмотров 8 тыс.2 года назад
Making and testing a Low Power SWR Meter. The project description at www.lloydm.net/Demos/swr.html includes construction and calibration details, as well a link to the Arduino Nano sketch. 73, WA4EFS 00:00 - Start 00:47 - SWR Bridge 1:59 - Calibrating 2:56 - Microcontroller 4:11 - Display 4:44 - Usage Example 5:57 - Ten Minute Transmitter 7:00 - Digression 7:36 - Back to QRPp 8:51 - Wrap-up
Radio-telegraphy Crypto Challenge
Просмотров 3532 года назад
Story of my participation in a unique radio / encryption challenge that was presented by the Maritime Radio Historical Society (www.radiomarine.org) and public coast radio station KPH on Saturday July 23, 2022. [Note that the Navy Hymn and its performance by the United States Navy Ceremonial Band are both public domain.] -73, Lloyd (WA4EFS) www.lloydm.net/Demos/index.html
Oven-controlled Crystal Oscillator
Просмотров 3,6 тыс.3 года назад
See also lloydm.net/Demos/ocxo.html. Compare precisely tuned OCXO-derived time base to GPS in Frequency Counting application. Also demonstrates frequency counting using an imprecise time base with arithmetic correction. 73, Lloyd (WA4EFS)
Relative RF Field Strength Meter
Просмотров 7 тыс.3 года назад
Full description at lloydm.net/Demos/fsm.html including circuit schematic and construction suggestions. RF activity up to 500 MHz is displayed on a panel micro-ammeter. 73, WA4EFS
Learning to Love Surface Mount Technology
Просмотров 863 года назад
What to do after completing a couple of small SMD ‘welding’ (soldering) practice kits. Write-up with details at: lloydm.net/Demos/Files/SMD-GPS_Frequency_Counter-2.1.ino.txt
TTL tester
Просмотров 1,3 тыс.3 года назад
Project write-up including schematic and microcontroller sketch at: lloydm.net/Demos/TTL.html. Test common TTL ICs. On failure indicate which logic gate or driver, etc. did not pass testing. 73, Lloyd (WA4EFS)
I/Q Radio
Просмотров 3854 года назад
Exploring the hardware part of Software Defined Radio... See the full project story with links to resources at lloydm.net/Demos/sdrhdr.html. 73, WA4EFS
Exploring Hamlib
Просмотров 3,9 тыс.4 года назад
GUI client that connects to Hamlib's rigctld TCP/IP listener. This application can be used to test or explore a ham radio transceiver interface. 73, WA4EFS Application download: www.lloydm.net/Demos/apps/rig_control_UI.zip
ISS packet QSO
Просмотров 3614 года назад
Amateur radio packets transmitted and received via ISS during one pass over my location on May 29, 2020. 73, WA4EFS
GPS Disciplined Frequency Counter
Просмотров 5204 года назад
Full project write-up with schematic and microcontroller sketch at: www.lloydm.net/Demos/GPS_freq_counter.html. GPS corrected pulse per second signal gates a counter circuit for accurate frequency measurement up to tens of MHz. 73, WA4EFS
Two Teensy Touchscreen Projects
Просмотров 3,7 тыс.5 лет назад
Two Teensy Touchscreen Projects
ARM Radio SDR
Просмотров 1,4 тыс.5 лет назад
ARM Radio SDR
Song of Pi
Просмотров 885 лет назад
Song of Pi
OLED Magic Eye
Просмотров 1,9 тыс.5 лет назад
OLED Magic Eye
Hilltopper 20
Просмотров 1,1 тыс.5 лет назад
Hilltopper 20
Morse code word practice
Просмотров 2556 лет назад
Morse code word practice
Orbitron To SDRuno
Просмотров 2,8 тыс.6 лет назад
Orbitron To SDRuno
Fun with Measurement
Просмотров 1046 лет назад
Fun with Measurement
Arduino GPS NTP Server
Просмотров 5 тыс.6 лет назад
Arduino GPS NTP Server
Semi-automatic key (bug) emulation
Просмотров 1836 лет назад
Semi-automatic key (bug) emulation
Three fun (and inexpensive) QRP transceiver kits
Просмотров 48 тыс.6 лет назад
Three fun (and inexpensive) QRP transceiver kits
XBee Friends
Просмотров 256 лет назад
XBee Friends
ZZRX 40 receiver kit and AD7C VFO
Просмотров 1196 лет назад
ZZRX 40 receiver kit and AD7C VFO
Mother of All Keyers
Просмотров 1096 лет назад
Mother of All Keyers
crash
Просмотров 466 лет назад
crash