[Today’s run: 3.4 miles]
My work on the Belar modulation monitor has led me into revisiting some projects from 2014. At that time I built an arduino-controlled DDS using a AD9850 ebay-sourced board, and then another one using an Si5351 clock generator chip.
The AD9850 actually made it into a box. But I never liked the rotary control on it or the way the software worked. I pulled it down off the shelf the other day to feed the Belar in stead of a crystal.
I had a second AD9850 board and a second Arduino Nano in my parts box, so I thought I would put them together on a breadboard and see if I can improve the software and then update the boxed unit. I have it up and running but haven’t tackled the software modifications yet.
I have two more unpopulated boards for the Si5351 signal source, and all of the parts needed to populate them.
I found the band-pass filter project that I had finished but never applied to anything. It took me a lot of time to wind all of those toroid coils. One of these days I need to make something useful from that. With a signal source and band-pass filter I have about 25% of a ham radio receiver right there.
I’m supposed to be working on self-education and job hunt and instead I have gotten sidetracked into some fun projects. I don’t know what to make of it. I find I am cutting back on Facebook and Redit; I consider that part a win.