[Today’s run: 3.4 miles]<\/p>\n
My work on the Belar modulation monitor has led me into revisiting some projects from 2014.\u00a0 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.<\/p>\n
The AD9850 actually made it into a box.\u00a0 But I never liked the rotary control on it or the way the software worked.\u00a0 I pulled it down off the shelf the other day to feed the Belar in stead of a crystal.<\/p>\n
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.\u00a0 I have it up and running but haven’t tackled the software modifications yet.<\/p>\n
I have two more unpopulated boards for the Si5351 signal source, and all of the parts needed to populate them.<\/p>\n
I found the band-pass filter project that I had finished but never applied to anything.\u00a0 It took me a lot of time to wind all of those toroid coils.\u00a0 One of these days I need to make something useful from that.\u00a0 With a signal source and band-pass filter I have about 25% of a ham radio receiver right there.<\/p>\n
I’m supposed to be working on self-education and job hunt and instead I have gotten sidetracked into some fun projects.\u00a0 I don’t know what to make of it.\u00a0 I find I am cutting back on Facebook and Redit; I consider that part a win.<\/p>\n
<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
[Today’s run: 3.4 miles] My work on the Belar modulation monitor has led me into revisiting some projects from 2014.\u00a0 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.\u00a0 But I never liked […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-6701","post","type-post","status-publish","format-standard","hentry","category-ham-radio"],"_links":{"self":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/6701","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6701"}],"version-history":[{"count":1,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/6701\/revisions"}],"predecessor-version":[{"id":6702,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=\/wp\/v2\/posts\/6701\/revisions\/6702"}],"wp:attachment":[{"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6701"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6701"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/w0ep.us\/OM\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6701"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}