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Ok, am I a little harsh, maybe, but when you have a keyboard that you don't use very much, just think of the wasted CPU cycles scanning the Keyboard! I one minute, in one hour? So what to do? In steps our 8 input to 3-line, Priority Encoder TI SN74x148. A0 A1 A3 = GS H H H 0 H 0 0 1 4 L Table 1   Ok, you ask what is a Priority Encoder? Put it simply it is a device that will generate the proper output for any given key. Without a keypress, the encoder's output is 0.(update #2)  So let's ...
Well, pigs fly! And I straightened both the back panel and the front panel. But alas I have miss laid the finished front trim panel.  So I'm going to resemble it without the outer front panel, and then do it all over again when I find the damn outer panel. So here goes. All of the labels have been lost strayed or stolen.  So this will be done in the blind! And of course, there will be lots of pictures. The ammeter works, but it will need a new scale, about 20 to 40 bucks and a new jew ...
Well, here we are again, the MAX6955 went down in flames as it will only work on LEDs. So we have to start over. The Analysis: The NCD is comprised of 4 groups: Display, Keyboard, Rotary Switches, and Thumb Wheel Switches.  The Display is comprised of 4 16-segment and 13 7-segment PinLite lamps, and two LEDs.  The keyboard is comprised of a 10 key number pad and 4 special keys, it also encodes A-Z. There are two rotary switches, and two thumbwheel switches as well. I also found a user ...
OK, last time I might have confused you with 2-level interrupts. So here it is and please refer to the schematic. So here's how it works. In this diagram, you see 4 switches 2 rotary and 2 thumbwheel switches.  You will notice that each of the two rotary switches are inputs to 8 to 3 priority encoders and 8 input NAND gates aswell. And the Thumbwheel switches do not have them as they already have BCD outputs. So we can just use their raw outputs.  Also, the Thumbwheel switches are also ...
Oh my lord back to this monster again. I took another look at what's really going on in this thing. Display Switch Mode Switch Thumb Switch 1 Thumb Switch 2 int 1 int 2 int 3 int 4 Keyboard int 5 Communications int 0 I have broken it down into functional sections. By using the Arduino Mega I have  6 hardware interrupts 0 - 5, which will take care of the I/O.  Below you can see my logic for the hardware. Basically by grounding the common of the switch which is the inp ...
Well Mr. UPS just showed up late today with a package from Element14 and tariq.ahmad. Now I wondered what could it be? So I ripped it open. Inside aside from propaganda Tee Shirt and Stickers, there was an Arduino Micro 5v, a Huzzh Feather, and two antennas, one for WiFi, the other for Cellular. And yet another Solderless Breadboard. Oh yes and the note wishing me happy holidays on a Disney Star Wars postcard. So to all my palls at Element14 happy holidays, merry Christmas, happy Hanukah, or wha ...
This is what you might have in your house. A 200 amp main panel, with a sub-panel for your Basement. You will notice the four large breakers in the lower left of the main panel, One of them feeds the sub-panel. But there only separated by a few inches. We will separate them by tens of feet. Also, the panel will not be a standard electrical panel, As I can't mount my controls inside. We will solve this problem by using industrial control boxes in which everything is mounted on DIN-Rails. This pro ...
This photo is to show you what this person thinks a Smart House should be wired! And there is a ton of it. I don't consider this very smart! Rember in my last posts, I talked about smart wiring? So let us start with the Requirements for the Rooms first. Rooms that are about 15' to 20' square.Network Cables: 2 in most rooms VoIP Cables: 2 in most rooms (2 phones as each phone is plugged in the VOIP switch 24port Cisco) TV Cables: 2 in most rooms, Larger rooms can but doubled Office 4 RJ45 Da ...
phoenixcomm

Hacking Your Library

Posted by phoenixcomm Top Member Nov 30, 2019
In 2004,  Kendall Grant Clark of www.XML.com, wrote a series of articles called "Hacking The Library" they where: Geeks and the Dijalog Lifestyle (Feb 8, 2004) The Library of Congress Comes Home (March 17, 2004) Six Steps to LOC@Home (April 28, 2004) Putting ISBNs to work (June 2, 2004) Also, PyZ3950 a pure Python Z39.50 which you will need as well. And lastly, you need Tyrannionware: Synopsis: "Tyrannioware (written in Python) retrieves MARC data via Z39.50 from a host (I've tested a ...
Monthly Projects II: 2020 - 1/25/20/20 Acoustics Competition 1/25/2020 Nexgen: FAA Nav Aid Station Morse Code Id 2/03/2020 Slant Range Math - Revisited 2/09/2020 Design Overview Software Design 4/5/2020 Morse Code Software 3/17/2020 Restoration & Repair 3/24/2020 Repair My BK 3010 3/12/2020 BK3010 Overhaul 3/14/2020 BK3010 Repair 3/29/2020 BK3010 Resurrection! 4/3/2020 BK3010 Video   Back to the Main Index <img  style="width: 40px; height: 40px; displa ...
On the bench Terminal Session Well, I'm not done yet. I might be down. I need some more stuff for this project so off to Micro Center. And about 130 miles later. I started over from scratch here is what I did: * Please note: this information has come from two sources https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Flashing_eMMC BeagleBone AI Survival Guide V3.11: PWM I downloaded a new image from Debian to my computer. copied to my 64 Gb Flash with a DD command. In /boot/uEnv.txt:  ...
Road Tests: Smarthab: Jul 21, 2013 Review of Anaren AIR CC2530 BoosterPack Kit Feb 5, 2019 Essentials: Automation I Sep 27, 2015 Review of  TI Multi-Node IoT Bundle Dec 24, 2019 Welcome to Smart Wiring Dec 12, 2019 Smart wiring II Feb 11, 2019 Door Strikes Sept 14, 2019 Facial Recognition Jun 4, 2019 Remote Sensing and Control   Back to the Main Index ...
To give you all a refresher about NASA's EADIN Lite Communications Protocol, I was happy to embrace it. The problem is the downsides for me: Only an 8-bit payload. Before the Data Field, I need a Data Lenth Field of 1 byte Each board must be programmed for its unique address in the chain. As I am very lazy, I can resolve this by installing a 4-bit switch that can be set be for installing into the network. This address is read at startup. And I don't need the CRC check Also, the node_ID and ...
Well, the power and the cables are getting under my skin. So being in Dallas, I stopped at Tanners Electronics, and I solved my cooling issues and power which now includes a 12vdc fan. So this is what I picked up today. A Pace AC Adapter 115AC to 12vdc @ 3amps. A female DC jack to plug the power supply into.  A DC fan model: FFB0812EHE 12vdc @ 1.35 amps A DC to DC converter. (Adjustable) A USB A Breakout board This is all going is a small plastic box, as I am tired of the balancing ...
As much as l like Debian 9.x, I hate this jury-rigged Cloud 9 Interface. Just getting the BB AI on my network (static IP address) was a chore and way too many steps! This took many hours of trial, blind alleys, and miss-steps, As there is NO network icon on the desktop or trays. So for those of you that want to follow in my footsteps, here we go: Click on the Red Menu button in the lower-left Click on Preferences Click on Connman UI Click on Config  button at the bottom right (you mi ...