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Category Archives: Knowledge
CNC – At last!
The CNC machine is functional. I had been on a bit of a mission lately, to get the machine up and running. Among things that needed to be fixed, replaced, or installed: – The router bearings were going out, so … Continue reading
Posted in Electronics, Knowledge, Making, Technology, Woodworking
Tagged CNC, Hall Effect switches, Router, Super-PID
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PCB Fabrication – Getting the hang of it
With my first PCB under my belt, I was ready to etch a board for something I really need. I took the lessons learned last week, and was able to produce a really nice result this time. This is a … Continue reading
PCB Fabrication – been there, done that.
Well, I did it. I decided to tackle something simple for my first attempt at etching a circuit board. I wanted something with a low parts count, and that was easy to test. I decided on a voltage level shifter … Continue reading
NAS is the new Plex
In my continuing battle against the $70/mo “cable” bill (I have satellite TV, but same guts), I have been pushing both hardware and software at the problem. So far, I’ve tried: Here’s a short history of recent events. In November, … Continue reading
Sidereal seconds hand
I spent some time thrashing about trying to make sure that the circuit was producing the correct output. I decided to try the Hz counter on my DMM, to see whether it could give me an accurate enough reading. Hooked … Continue reading
Sidereal clock, baby!
…well, I’d need an oscilloscope to confirm, of course. But I converted the Bresenham/Black algorithm to Arduino code, mixed in code from a Timer Interrupts tutorial from the web (I should link to that here), and loaded it up. Worked … Continue reading
Posted in Electronics, Knowledge, Making, Science, Technology
Tagged Arduino, Astronomy, Clock, Sidereal
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Sidereal clock circuit — progress!
I’ve been kicking around the idea of making an accurate sidereal clock circuit for years now. I’ve discussed it all before, but the basic idea is that I want to be able to create a circuit that oscillates at 32857.715Hz … Continue reading
Posted in Computers, Electronics, Knowledge, Making, Science, Technology
Tagged Arduino, Astronomy, Clock, Python
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A slice of Pi
I have a Raspberry Pi on the way. Since I’m mostly an Arduino shop, I have to think about how to interface my existing goodies with the new board. This one looks cool:R Pi to Arduino Shields It makes use … Continue reading
Bringing the Home Theater together with Plex
I tried XBMC as a Home Theater PC “OS” — it certainly did a fine job of presenting movies from our LAN in an easy-to-navigate manner. But, because Netflix was on another box, and Tivo on yet another, the HTPC … Continue reading
EyeTV is the new Tivo
I’m in the process of updating/rebooting my home theater. The most complicated part of this is the Tivo/Live TV replacement. I considered trying Hulu, but because I already have a HD-ready off-air antenna, I decided to see whether I could … Continue reading