I have built a circuit that doesn't work. (This is not unusual for me.) The circuit uses relays to count pulses from an old rotary phone dial... or is supposed to. I'm using a combination of the following circuits from http://www.electronixandmore.com/projects/relaycomputertwo/index.html (their...
The bi-color matrices I ordered turned out to be common-anode ones, and not common-cathode as I expected. This means that I can't drive them with the HT16K33 chip as I planned, as it only has 8 cathode pins. I can't even use two such chips to drive the...
Liveboot is still useful, small utilities can liveboot and run wonderfully as a system to learn on, sandbox small projects on, or even to install from or repair systems with. We've even got some hacks for persistence, where your settings stay the...
I hope this is the right place to post this. I'm building an 8x8x8 single color LED cube. I've built test circuits on a breadboard and it works. However, I'm disappointed that the LEDs are much dimmer than when they're not multiplexed. It makes sense...
I am sure that anyone with experience my have several questions as to why I have done some of the things that I have done in my board designs, and the answer to that is simply because I am making it up as I go along. Those details will hopefully work...
A member asked about which of the Tesla inventions I wanted to work on as a team build? Pick any of his projects, one person mentioned "the death ray" I was gearing toward his motorized boat. Once we have enough suggestions we can due a vote. (1. Build...
Hello All, I maintain a blog about the polywell. For those who do not know, the Polywell is an idea for a fusion reactor. It is based off the fusor (a concept some of you guys are building and talking about on the project page). I have some fusion/polywell...
Hello! I have read HAD for years. I love the projects and creativity of the people around the world. I rarely mess with anything electronic at any sort of micro level. I hope this is OK to post here. The other day, a friend of a friend asked me to look...
Thinking: paying tribute to one of the greatest TV characters of all-time (Spock) with a custom 1 of 2 builds: a communication tri-quarter and a hand phaser, any comments or suggestions are welcome.. In memory of the legendary actor Lenard Nimoy, who...
I'm too impatient to wait for Valve to put out documentation on their Lighthouse VR tracking technology and want to at least get a leg up on making my own tracked objects. If you don't know, Lighthouse sweeps the room with a hundred broad laser lines...