AmateurRadio.com

What is the proper (and most efficient) technique for creating Morse code by hand, using a manual Morse code key? Ham radio operators find Morse code (and the ‘CW’ mode, or ‘Continuous Wave’ keying mode) very useful, even though Morse code is no longer required as part of the licensing process. Morse code is highly effective in weak-signal radio work. And, preppers love Morse code because it is the most efficient way to communicate when there is a major disaster that could wipe out the communications infrastructure.

While this military film is antique, the vintage information is timeless, as the material is applicable to Morse code, even today.

More about Morse code, at my website: http://cw.hfradio.org

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See my Video Playlist for related Morse code vidoes:

Another Arduino project I’ve been working on is a DTMF decoder used to control a relay board. Using a ham radio receiver, I can switch lights, radios, computers…anything…on or off from miles away. Here’s the video:

Here’s the wiring diagram. And here’s the Arduino code.

I’m using a Sainsmart 4 relay board, although pretty much any relay board would work. You’ll also need a MT8870 DTMF decoder – these run about $2 on ebay. And of course, you’ll need an Arduino Uno. Again, check out ebay for these as well. The total cost here should be less than $12 and you’ve got a fully functioning radio controlled DTMF relay controller!

Another Arduino project I’ve been working on is a DTMF decoder used to control a relay board. Using a ham radio receiver, I can switch lights, radios, computers…anything…on or off from miles away. Here’s the video:

Here’s the wiring diagram. And here’s the Arduino code.

I’m using a Sainsmart 4 relay board, although pretty much any relay board would work. You’ll also need a MT8870 DTMF decoder – these run about $2 on ebay. And of course, you’ll need an Arduino Uno. Again, check out ebay for these as well. The total cost here should be less than $12 and you’ve got a fully functioning radio controlled DTMF relay controller!

This week we installed a new Yaesu Fusion DR-1X repeater at a very nice site in Central Illinois. One of the things I’m a big fan of is controlling supply power via the web. This ability to remotely control the repeater is great – even if the controller goes belly up, you can turn the entire system off or just remotely power cycle it. I’ve used the Digital Loggers data center type power strips before, but they are a bit expensive – over $100. So for this site, I used the Iot Relay – Enclosed High-power Power Relay for Arduino, Raspberry Pi, PIC or Wifi, Relay Shield also from Digital Loggers. At under $20 from Amazon, it’s a great deal. It’s a relay connected to four outlets, enclosed in a very nice plastic case. Hooked to a Raspberry Pi, this little box provides me the ability to power cycle or turn off any equipment via the web. How do I get the from the web to the remote repeater site? Well through AREDN ham mesh software running on 5GHz equipment of course!

Since I had an extra Raspberry Pi on the shelf, this quick hack made for a fun project. I’m also going to add a temperature and humidity sensor so that we can monitor the environmental conditions in the repeater building. Here’s a short 3 minute video I made explaining the code and the connections. Have fun! Put the Amateur back in Amateur Radio!

This week we installed a new Yaesu Fusion DR-1X repeater at a very nice site in Central Illinois. One of the things I’m a big fan of is controlling supply power via the web. This ability to remotely control the repeater is great – even if the controller goes belly up, you can turn the entire system off or just remotely power cycle it. I’ve used the Digital Loggers data center type power strips before, but they are a bit expensive – over $100. So for this site, I used the Iot Relay – Enclosed High-power Power Relay for Arduino, Raspberry Pi, PIC or Wifi, Relay Shield also from Digital Loggers. At under $20 from Amazon, it’s a great deal. It’s a relay connected to four outlets, enclosed in a very nice plastic case. Hooked to a Raspberry Pi, this little box provides me the ability to power cycle or turn off any equipment via the web. How do I get the from the web to the remote repeater site? Well through AREDN ham mesh software running on 5GHz equipment of course!

Since I had an extra Raspberry Pi on the shelf, this quick hack made for a fun project. I’m also going to add a temperature and humidity sensor so that we can monitor the environmental conditions in the repeater building. Here’s a short 3 minute video I made explaining the code and the connections. Have fun! Put the Amateur back in Amateur Radio!

I’m happy to report I’ve been involved in adding three new hams to our ranks in the past two weeks. I had lunch with one today and we got to talking about radios. He wants to get on the local repeaters right away, and so we started talking about analog versus Fusion versus D-STAR. When we got to the topic of price, I was blown away to find out he had found brand new D-STAR ID-51 VHF/UHF handhelds for $299.95 shipped. It’s a long way from a $20 Baofeng, but to have the ability to talk around the world on VHF or UHF for $299.95? That’s a pretty good deal.

I’m happy to report I’ve been involved in adding three new hams to our ranks in the past two weeks. I had lunch with one today and we got to talking about radios. He wants to get on the local repeaters right away, and so we started talking about analog versus Fusion versus D-STAR. When we got to the topic of price, I was blown away to find out he had found brand new D-STAR ID-51 VHF/UHF handhelds for $299.95 shipped. It’s a long way from a $20 Baofeng, but to have the ability to talk around the world on VHF or UHF for $299.95? That’s a pretty good deal.