T&L Publications

More than years ago I started seeing this type of fuel cell hype show up on the web. Supposedly you would be able to get a fuel cell that ran off natural gas or propane. An inverter powered by this DC fuel cell would sit just ouside your house or maybe even in your basement. It would make very littl...

In engineering school a team of EEs and MEs tried making a robotic mower. It "sort of" worked. Still don't see it on the market. As far as RC mowers go I've read several designs on these. If I were doing this here is what I'd do: Gasoline engine for main power. Despite the fact that electr...

You may consider using something like a home security system that uses wireless sensors. There are many sensors and if you use something like a GE Concord (either Express for basic, or Concord 4 for "professional") it will have built-in wireless receivers. The sensor types are many. Some o...

This can all be done with software; no need for a motion sensor as the camera acts as the sensor. When there is a significant motion on the camera the overall picture "changes". The software recognizes this and then records. In some cases the software is always recording into memory but do...

CeaSaR, you beat me to the punch. My comment is on the name change is simple.

Lipstick on a pig.

I understand you DON'T want to go DC AC DC. But let me throw some economics in for you. The device you posted the link to is $80. Inside it goes DC to AC and back to DC and is basically a switching regulator. So why not just use a switching power supply? For about $30 USD you can get a mini-ITX form...

While the Ramsey kit will work, there is a MUCH cheaper and very effective way to jam FM radio. See this link: http://www.next.gr/inside-circuits/TV-and-FM-jammer-schematic-l4106.html I built several of these in high school; when most people still got TV over the air. You could black out the entire ...

Another evil thing I did as a kid was when I was 13 and just got my first ham ticket. That was in '63. One Christmas the neighbor kids got a set of Walkie Talkies (Those old crude Citizens Band flea power units). I had an old Knight Kit signal generator. Matter of fact it still exist today in my mo...

I will throw in a few cents here. A battery must be charged with a voltage somewhat higher than the "rated" voltage. For instance a car battery will float just under 13 Volts even though it is considered a "12 Volt" battery. The electronics used in cars (think CB, radar detector,...

Nice idea. Moderators/Admins. Any possibility of making this a STICKY so it is at the top for the next few months?

There's always BartPE discs. This boots Windows more or less (you need the WinXP install files to build the disc) and you can download the McAfee virus scanner as an add on. BartPE will boot off a USB thumb drive. If you have a Big Lots, Dollar General, Family Dollar, etc. they sell HP brand 50 disc...

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I did this for my work several years ago. Still going strong, on second set of TVs. I used LCD TVs with VGA inputs. I used a plain old Windows computer. It can do Power Point or Windows Media Player etc. (Note I said second set of TVs. These being on 24/7/365 burned out the first TVs after about fou...

Intermatic makes what you want in a wall switch. Be careful as they have some that are "lighting only" loads (read incandescent) and others that will work for motors and lighting. Look at this device as an example of something that can control lighting and inductive loads: http://www.inter...

Kites are fun. I used to build large(ish) deltas; about a five foot wing span. My problem is they would break just about any string I used with them. I had to wear gloves to reel them back in. I always wanted to attach a strobe or other lights to one and fly it at night. When one of those gets to sp...