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  • A better Bluetooth Speaker

  • Here's the quick once-over for some project details:Inputs:-Bluetooth audio input, capable of AAC and Apt-X transport if possible-SPDIF input, stereo, 28kHz 24-bit-3.5mm jackOutputs:2 tweeters, stereo2 woofers, paired together (mono)Why the two woofers...
  • 3 cornered hat

  • When your measurement reference is not at least a couple of orders of magnitude better than the device you're trying to test, it's difficult to tease out how much of the result is the responsibility of each device. Fortunately, there's a way you can...
  • The gifts from the past

  • People roll their eyes when they see the stock of parts that I "conserve". However sometimes it pays off.If you remember my rant about obsolescence, you know that it's hard to keep old technologies working when software interfers. You need hardware to...
  • Second Life for Batteries

  • A good friend of mine posited a few months ago about what will happen to all the lithium ion batteries after they've reached the end of their usefulness? These cells typically will be able to hold an 80% charge, which is good enough for many applications...
  • Starter box stuff!

  • I don't know if anything in here is terribly exiting but here is what I have to put in the starter box.A bag of jelly bean pnp transistors take what you need or take them all.A bag of 1n5000 diodes, good for rectifier setups.A bag of 1k short lead resistors.A...
  • Slogging it through

  • Well, it's been a busy few days.While not the results I wanted to show you by now, I can say I'm making progress. What I've been doing is going through all the variables involved and working on charting out the results. I'm concentrating on ABS right...
  • Checking I2C pull-ups

  • TL;DR: Always check your signals with an oscilloscope! Long version: I wanted to try out rosruby, a ROS wrapper for the ruby programming language, so I decided to port the ROS node for the LPD8806 LED strip of this robot to it. This strip uses...
  • Design Thinking 2: Define

  • The next step in design thinking is Define. We spent time trying to further define the problems in the kitchen based on the Empathize step.  Define is determining users' needs, their problem and related insights. Some of the things we came up with:...
  • Catastrophe!

  • Two days ago the worst thing happened: I tried to access the NAS over the network and couldn't. I could log in to OMV ok, and interrogated the setup only to discover both Main and Backup filesystems weren't mounted (or mountable) and even the disks...
  • F°LUEX

  • Especially my 8 year old daughter has often fever due to the daily contact with other kids. Mostly fever starts on weekends, so that our pediatrician is not available and we as parents wonder if she has caught a cold or a flu. It is indeed possible to...
  • Tear Down

  • Microwave can generate lethal voltages, and as a reminder, please make sure it isn’t plugged in when you start working on it. Remove the U shaped metal shroud over the top and sides of the microwave. These are held in by a few metal screws and one of...