T&L Publications

John T,<p>That sounds like a fun RF project!<p>Your idea reminded me of another project not related to RF but which involves a distance alarm:<p>In the object, place a GPS unit which transmits the objects coordinates (lat.&long.) to fixed position reciever (these units are cheap and used by equi...

HighFrequency,<p>You and Chris have reminded me of one of my favorite lines from The Matrix:<p>Morpheus to Neo:<p>“If real is what you can feel, smell, taste and see, then 'real' is simply electrical signals interpreted by your brain …your mind makes it real”

Enzo,<p>I appreciate your concern for the others.<p>Thanks for the suggestion about the bullhorn but that is not the sound I am looking for. I like the sound of a nice loud PA system.<p>However, I do like your idea about the car horn and battery.

Mike: That amp is a little more than I need on this one but I may look you up on another project.<p>sofaspud: I am going to try to put it together from your parts list, I'll let you know how it goes.<p>Matt: I will use the amp you suggested.<p>thanks guys

Fellow Forum Members,<p>I am interested in building a portable PA system, something really loud that I can use at my boy's little league games or other similar type events (I will try not to be too abnoxious with it).<p>Here is what I have in mind:<p>1. 12" speaker 2. microphone 3. amplifier (k...

Dave,<p>That is a perfect explanation. Thank you.

Why is the device called an "invertor"? What is being inverted? Is there a better word for what the device is doing?

jwax,<p>What does the inverter do in Learner's power supply? Why is it necessary? I have been hearing the word "inverter" for alot of different applications lately. <p>Recently I overheard a guy say that he has an "invertor" on his car DVD player that allows him to plug in his la...

Thanks Mr. Al and Philba, that is exactly what I need.

Actually I found the name of what I need, but I can't find where I can get it> I need an A3515 Ratiometric Hall Sensor. <p>Does anyone know where I can order one?

I found the sensor I need.

I need to measure the relative strengh of a bar magnet vs distance from the sensor. I think need a magnetic field sensor that can be used to measure the relative strength of a magnetic field. The Hall sensors from Radio Shack are switches, I don't want a switch. I need a sensor that is simple and th...

Philba:<p>thanks for the correction, I shot from the hip with my reply

3Phase:<p>AVR is the name of a company that produces microcontroller systems.

isomk:<p>be carefull when you buy stamp kits, many of the kits out there are very incomplete and very expensive, often they dont even have the stamp itself but only the project board with a bagfull of components for earth experiments or some other specifc use. I believe a complete kit (BS2 and board...