Profile

Cover photo
Bryan Walker
3 followers|1,108 views
AboutPosts

Stream

Bryan Walker

Shared publicly  - 
 
The home energy monitor/work project is progressing, but not without some hiccups. Protip: When buying parts from defunct countries, always be sure to check that they are marked properly!
My boards came back from OSHPark late yesterday afternoon, so I went ahead and built one up this morning. Most of the parts came from new stock or the shop's parts inventory, but the diodes did not - germanium diodes are easy...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
I have some proprietary wireless sensors scattered around the house, but I want to replace them with something a little more useful. I found that in a generic PLC board, so I've decided to go ahead and mount it, and add more sensors for testing.
Now that I've confirmed that the CAI board works, it's time to put it in a box. For this project, I used one of the boxes I'd originally purchased for the energy monitor project. This was a wired alarm housing when purchase...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
Instead of buying one from the manufacturer at a high price, I spent some time with a few junk-box parts and made one.
A while back, I wanted to start adding some temperature sensors to my place. The eventual intent is to tie it all in to a control system of sorts. Eventually... I looked at a bunch of different ways of reading data. The Ra...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
The filter and rectifier board from an old spectrum analyzer project. I'm re-using the rectifier design in a modern energy monitor system.
Several years ago I had a rack of stereo components that I had collected over the years. Tape deck, FM unit, dedicated amps, CD player, the works. I always though it would be kind of cool to have a nice analyzer unit for the ...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
I rebuilt some junk chassis Blonder-Tongue tube equalizers years ago. Here are a few of the pictures I took at the time. If you know where these are, please let me know. I'd appreciate seeing them in use!
A long-ago project, these two Blonder-Tongue Audio Batons were a complete teardown and refit, as best I could make them with limited parts. These were one of the first active audio EQs, and used 12AX7 vacuum tubes to provide ...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
Making one-wire temperature sensors to withstand the elements.
Similar to my previous build, here are some more temperature sensors using DS18S20 TO-92 case 1-wire temperature sensors. These are designed to talk to an AVTECH Room Alert system, but would work just as well with any device ...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
Starting to figure out how I'm going to get the home energy monitor's data into a useful form. I'm starting with the base functionality, that of measuring the current going into the main box. This precision rectifier board will act as a middleman, converting the AC output of the current transformers to DC for input into a ADC.
One of the interesting things the CAI board offers is some analog 10V inputs - DC of course, but this is perfect for getting some sort of data back into the system. It just so happens the clips I purchased for the energy moni...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
My first PCB design. It didn't go into production, as the company decided to dump the entire project and start over. Oh well!
One of the projects I've been working with is an interface board for an embedded computer system. While I've never designed anything like this before, I've worked with board for 20+ years and have a decent idea of how things ...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
Those cheap as dirt LED solar lamps you get online don't last long...
I've always had a few alarm signs scattered around the place, but they've faded to the point of being useless. So a few summers ago, I decided to get some new ones. These signs included a nice little solar powered LED device ...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
The display driver from an old spectrum analyzer project I was working with. I set it aside when I changed jobs a long time ago.
Another board from my Spectrum Analyzer project, this was supposed to be the display driver. I had originally intended to have a dedicated right and left channel, and a scanned 10 channel audio analysis function for the var...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
Some more (film, this was before digital!) pictures of a couple of Blonder-Tongue vacuum tube equalizers I rebuilt from junk chassis. I sold these on eBay years ago, if you happen to know where they are I'd appreciate more pictures!
A family member recently gave me an envelope full of things related to my high school - certificates, grade cards, that sort of thing. Upon sorting out the papers, I came upon some more pictures of my Audio Baton restoration ...
1
Add a comment...

Bryan Walker

Shared publicly  - 
 
Too much junk? Never.
Never. It's all good stuff. Not junk. No sir. Bitcoin? 1B1DWLzvgp3tdtNjbHufyqRP1fUdN6HXLh
1
Add a comment...
Links
Contributor to