Arduino Sketches

I dabbled with Arduino to build some small projects back in 2021, mostly using the SI5351 PLL chip. A lot was learned from the You Tube channel, and blog, of Charlie Morris ZL2CTMhttps://www.youtube.com/c/CharlieMorrisZL2CTM and https://zl2ctm.blogspot.com/.

I built a 60m QRP SSB/CW/Digimode transceiver which started as a Direct Conversion DSB radio and then morphed into a superhet SSB rig with 9MHz IF and crystal filter. I was also was in the process of building a phasing RX and CW TX to make an HF CW transceiver - band TBC but it was working on 17m when I drifted off the path and abandoned radio for a while.

I've dug out the 60m rig and it's still working. I've got it in my new shack as a 60m monitor RX. One of its features is a “scanner” - just cycling around a selection of channels pausing for a second and moving on which is handy for spotting activity popping up on one or other channel.

Today I also went searching for the Arduino sketches for all my little experiments at the time, and found them on the old laptop I used in the shed-shack at the time. This laptop is physically decrepit - screen broken etc. - but can still be accessed over the LAN. I've retrieved all the sketches and they are linked at the bottom of the page.

It's been a while (5 years!) since I played with Arduino and the 5351 PLL, so I'm a little rusty, but I'm considering making a QRSS TX to run on 60m, if I can find somewhere to put a small base-loaded vertical (perhaps a helical linear-loaded vertical?). The first step will be to write the Arduino sketch to make the 5351 make pretty patterns on a waterfall. Then a simple 500mW PA strip shouldn't be too difficult.

I still have some un-used Seeduino Nano boards and some 5351s, so I think I'll rig up a development board and start writing code. Small baby steps….

Page created : 10/07/26 22:55 BST

Page updated : 10/07/26 23:12 BST