build video

Todd over at has posted a new video, part 5 in his Arduino Frequency Display For Kenwood TS-520S HF Ham Radio series:

In the video, he solders up the project, mounts it in a chassis, and tests it out.  You can also see the previous 4 parts on how he came up with the design on his website.  Nice to see it built and working out side of my bench!

They did have an issue with the frequency appearing to be slightly off, that might have been the version of code he was running – the gate time seems to work best (and be most accurate) at 125mS, the original code was using 100mS.  Another issue that I have run into is that the later Arduino’s (like the UNO) do NOT use a crystal for the clock – they use a ceramic resonator.  Fine if you want to blink some LED’s, not so good if you want to measure a frequency.  Todd and I both used Arduino  Duemilanove’s – they can still be purchased at places like

This is all open source – you can download the project, the BOM and the code from this page.

Great to see the end product. Let me know if you build one!


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