Add post about Signal 1
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@ -19,11 +19,12 @@ pygmentsstyle = "monokai"
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name = "Ariejan de Vroom"
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name = "Ariejan de Vroom"
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[permalinks]
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[permalinks]
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blog = "/:year/:month/:day/:slug/"
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blog = "/:year/:month/:day/:slug/"
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audio = "/audio/:slug/"
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electronics = "/:year/:month/:day/:slug/"
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[taxonomies]
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[taxonomies]
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category = "categories"
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category = "categories"
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tag = "tags"
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[params]
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[params]
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dateform = "2 Jan, 2006"
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dateform = "2 Jan, 2006"
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@ -36,7 +37,7 @@ faviconfile = "favicon.ico"
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highlightjs = true
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highlightjs = true
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progressively = true
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progressively = true
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share = true
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share = true
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latestpostcount = 10
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latestpostcount = 7
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github = "ariejan"
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github = "ariejan"
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email = "ariejan@devroom.io"
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email = "ariejan@devroom.io"
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linkedin = "ariejan"
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linkedin = "ariejan"
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date = "2017-10-16"
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title = "Signal 1 - Design and Requirements (Part 1)"
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tags = ["audio", "design", "electronics"]
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description = ""
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slug = "signal-1-design-and-requirements-part-1"
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Signal 1
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+++
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date = "2016-10-09"
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date = "2016-10-09"
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title = "Marantz PM80 Mk2 Repair Log"
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title = "Marantz PM80 Mk2 Repair Log"
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tags = ["repair", "audiorepair"]
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tags = ["repair", "audiorepair"]
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categories = [ "Audio Repair" ]
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categories = [ "Audio Repair" ]
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content/electronics/signal-1-part-1.md
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content/electronics/signal-1-part-1.md
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date = "2017-10-16"
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title = "Signal 1 - DIY Signal Generator (Part 1)"
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tags = ["audio", "design", "electronics", "signal-1"]
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description = "This is part 1 in a series of posts showing you how I build a digitally controlled signal generator based on the AD9833."
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slug = "signal-1-diy-signal-generator-part-1"
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+++
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**Signal 1** is the name for my first _signal generator_ project. The goal for this project
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is to create a device that can output clean sine waves in the 10 Hz - 100 kHz range. The
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primary use is testing audio equipment, like amplifiers.
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This is what I'm looking for:
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* Sine wave
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* 10 Hz - 100 kHz minimum, easily adjustable
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* Line level output (100-600 Ohm output impedance; 2Vpp)
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* Display of frequency and Vpp settings
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Bonus features:
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* Other waveforms, like triangle and square wave
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* Larger frequency range
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* PWM support
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* Graphical display for all kinds of information
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There are at this point two pieces of hardware I have selected:
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**AD9833 Programmable Waveform Generator** is a nice chip that can more than handle my simple needs. If
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it can go up to a 16Mhz square wave, that'd be great, but not necessary. It's also inexpensive when bought
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from China as a breakout board. I'm not usually a fan of there boards, but to for prototyping they should
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be fine. The AD9833 communicates for SPI, so I'll need a microcontroller to handle that.
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![The AD9833 Breakout Board](/img/signal-1-ad9833-breakout.jpg)
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**ATMega xxx** is a logical choice for me. I'm not tied down to Arduino, so writing C directly in the
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_Atmel Studio_ would be OK. Having a microcontroller present also opens up the possibility of having
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a decent screen (maybe even touchscreen) on this project.
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For now, I've ordered a few AD9833 breakout boards from China and I'll start working on a block diagram
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of the entire system soon, which you can read about in Part 2 of this series.
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static/img/signal-1-ad9833-breakout.jpg
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{{ partial "header.html" . }}
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<section class="main post non-narrow zero-top-spacing">
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<div class="container">
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<div class="content">
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<div class="front-matter">
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<div class="title-container">
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{{ partial "page-heading" . }}
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</div>
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<div class="meta">
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<div class="date" title="{{ .Date.Format .Site.Params.dateformfull }}">{{ .Date.Format .Site.Params.dateform }}</div>
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{{ if not .Params.noauthor }}
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{{ if .Params.author }}
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<div class="author" title="{{ .Params.Author }}"><div class="middot"></div>{{ .Params.author }}</div>
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{{end}}
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{{end}}
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<div class="reading-time"><div class="middot"></div>{{ .ReadingTime }} minute read</div>
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<div class="tags">
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<ul>
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{{ range .Params.tags }}
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<div class="middot"></div>
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<li><a href="{{ "/tags/" | relLangURL }}{{ . | urlize }}">{{ . }}</a> </li>
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{{ end }}
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</ul>
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</div>
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<div class="tags">
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<ul>
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{{ if isset .Params "hacker_news_id" }}
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<div class="middot"></div>
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<li><a href="https://news.ycombinator.com/item?id={{ .Params.hacker_news_id }}">Hacker News</a> </li>
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{{ end }}
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{{ if isset .Params "lobsters_id" }}
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<div class="middot"></div>
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<li><a href="https://lobste.rs/s/{{ .Params.lobsters_id }}">Lobsters</a> </li>
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{{ end }}
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</ul>
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</div>
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</div>
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</div>
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<div class="markdown">
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{{ partial "content" . }}
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<br>
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</div>
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{{ if .Site.Params.share }}
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<div class="share">
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<a href="" class="ssk ssk-facebook"></a>
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<a href="" class="ssk ssk-twitter"></a>
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<a href="" class="ssk ssk-google-plus"></a>
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<a href="" class="ssk ssk-linkedin"></a>
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</div>
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{{ end }}
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{{ if .Site.Params.posts_navigation }}
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<div class="navigation">
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{{ if .PrevInSection }}
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<div>
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<img class="icon" src="/img/back.svg" alt="back" />
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<a href="{{ .PrevInSection.Permalink }}">{{ .PrevInSection.Title }}</a>
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</div>
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{{ end }}
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<div style="width: 100%;"></div>
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{{ if .NextInSection }}
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<div>
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<a href="{{ .NextInSection.Permalink }}">{{ .NextInSection.Title }}</a>
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<img class="icon" src="/img/next.svg" alt="next" />
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</div>
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{{ end }}
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</div>
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{{ end }}
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<br>
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<div class="disqus">
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{{ template "_internal/disqus.html" . }}
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</div>
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{{ if .Site.Params.issoHost }}
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<div class="isso" id="isso-thread"></div>
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{{ end }}
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</div>
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</div>
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</section>
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{{ partial "footer.html" . }}
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{{ if gt $nbPosts 0 }}
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{{ if gt $nbPosts 0 }}
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<div class="page-heading">Latest posts</div>
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<div class="page-heading">Latest posts</div>
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<ul>
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<ul>
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{{ range (first .Site.Params.latestpostcount (where .Pages "Section" "blog")).GroupByDate "Jan, 2006" "desc" }}
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{{ range (first .Site.Params.latestpostcount .Pages).GroupByDate "Jan, 2006" "desc" }}
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<li class="groupby">{{ .Key }}</li>
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<li class="groupby">{{ .Key }}</li>
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{{ range .Pages.ByPublishDate.Reverse }}
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{{ range .Pages.ByPublishDate.Reverse }}
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{{ partial "li.html" . }}
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{{ partial "li.html" . }}
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{{ end }}
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{{ end }}
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{{ end }}
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{{ end }}
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{{ end }}
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{{ end }}
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<a href="/categories/audio-repair"><li>Audio Repair</li></a>
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<a href="/categories/electronics"><li>Electronics</li></a>
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<a href="/about"><li>About</li></a>
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<a href="/about"><li>About</li></a>
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<a href="/gpg"><li>GPG</li></a>
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<a href="/gpg"><li>GPG</li></a>
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</ul>
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</ul>
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{{ partial "header.html" . }}
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<section class="main">
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<div class="container">
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<div class="content">
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<div class="posts">
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<div class="page-heading">Blog</div>
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<ul>
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{{ range .Data.Pages.GroupByDate "Jan, 2006" "desc"}}
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<li class="groupby">{{ .Key }}</li>
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{{ range .Pages.ByPublishDate.Reverse }}
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{{ partial "li.html" . }}
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{{ end }}
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{{ end }}
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</ul>
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</div>
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</div>
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</div>
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</section>
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{{ partial "footer.html" . }}
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