{"id":6870,"date":"2012-01-30T07:36:03","date_gmt":"2012-01-30T15:36:03","guid":{"rendered":"http:\/\/nearfuturelaboratory.com\/?p=6870"},"modified":"2017-08-18T17:58:23","modified_gmt":"2017-08-18T17:58:23","slug":"this-is-what-i-sent-ear-freshener-pcb-design","status":"publish","type":"post","link":"https:\/\/blog.nearfuturelaboratory.com\/2012\/01\/30\/this-is-what-i-sent-ear-freshener-pcb-design\/","title":{"rendered":"This Is What I Sent \u2014 The Ear Freshener PCB Design"},"content":{"rendered":"

Here’s the current PCB CAD for the Ear Freshener. It’s sorta got two sides, but on the top I basically have a carrier for another board that contains the audio codec device. The components around it are all the brains that control track selection from the potentiometer\/knob \u2014\u00a0that people will think, hopefully, is the volume knob, but actually it isn’t.<\/p>\n

The gag\/provocation is that knob. It’s an audio thing with a knob..but the knob isn’t an on-off thing. Rather, it’s some kind of semantic intensity knob. You turn it “up” and you get more-of. You turn it “down” and you get less-of.<\/p>\n

There’s also a spot to hook up a little button. The button switches the Ear Freshener sound idiom. So you can go through the seasons; or cities; or airports.<\/p>\n

((We should figure out a good name for the gag\/provocations that we always build into our little devices.))<\/p>\n

To do this, I’m probably a little over-engineered, maybe. Maybe not. I use two Atmel Attiny25<\/a>‘s that basically do the track selection through a data port control on the audio codec. Basically counting in binary, with the track selection one doing the low-order bits and the high-order bits selecting the sound idiom you’ll be freshening your earballs to.<\/p>\n

There’s also a bit of circuitry for a step-up regulator. I want to run this off of a single, readily available battery cell \u2014\u00a0AAA or AA. I’m over USB charging for the time being. At least now. The extra crap you need is a headache. Sorta. I guess I just wanted to get back to that thing where your audio devices take a battery. Not that I want more batteries in the world, but the rechargeable ones? They’re fantastic nowadays. Lots of capacity.<\/p>\n

You’ll notice there’s a bunch of nothing on the right. I put that there for mechanical mounting of a battery holder for now. I just didn’t want the battery dangling off in nowheresville. This way I can double-sided sticky tape it to for testing and carrying around.<\/p>\n

That’s the deal. I sent off the data to AP Circuits<\/a> for the first time. It was about $40 with shipping for two boards. The boards are about 2.1in by 2.3in, so sorta small. There was a bit of back and forth to get the data they needed, especially for the board outline. This always ends up being something I leave out \u2014\u00a0my CAM Processor script doesn’t have that layer built in as output. Need to look into that.<\/p>\n

Why do I blog this?<\/strong> I need to keep going on making logs of activity for the various projects that go on here, even if it’s a quick note.<\/p>\n","protected":false},"excerpt":{"rendered":"

Here’s the current PCB CAD for the Ear Freshener. It’s sorta got two sides, but on the top I basically have a carrier for another board that contains the audio codec device. The components around it are all the brains that control track selection from the potentiometer\/knob \u2014\u00a0that people will think, hopefully, is the volume … Continue reading This Is What I Sent \u2014 The Ear Freshener PCB Design<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":6871,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[23,24,47,53,78,185],"tags":[1181,1191,1195,825,868],"yoast_head":"\nThis Is What I Sent \u2014 The Ear Freshener PCB Design - Near Future Laboratory<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.nearfuturelaboratory.com\/2012\/01\/30\/this-is-what-i-sent-ear-freshener-pcb-design\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"This Is What I Sent \u2014 The Ear Freshener PCB Design - Near Future Laboratory\" \/>\n<meta property=\"og:description\" content=\"Here’s the current PCB CAD for the Ear Freshener. It’s sorta got two sides, but on the top I basically have a carrier for another board that contains the audio codec device. 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