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Hi. The humidity sensor can be obtained canibalizing a defunct video tape recorder. Connecting the 9V battery and an adjustable resistor and an analog galvanometer in series, you can get a reading that would have to be calibrated to a dial. To use a led, it would need a comparator chip circuitry set...

Thanks, gentlemen. I tried sweeping the multiband AM radio along walls and does respond to a certain point to presence of energized wires behind the wall, also on shortwave and longwave bands; but the circuit is dead now; I will have to wait for whenever it intermittently comes back. At certain mome...

I do not have the circuit. But building it may be more headache, time and expense than buying one of the devices shown there. The biggest hurdle is typically a neat housing.
I have seen them advertised for about $70 somewhere.
Click on the other links at the bottom left of that page.<p>Miguel

You should had said that from day one.<p>Look here:<p>http://www.phonejammer.com <p>Enjoy,
Miguel

Hi.
I need to build or buy a sensor to locate the place a failing/intermittent AC wiring runs behind household drywalls. The AC presence (or not) detection distance could be as much as 4 inches. I have one of those FET AC-hot proximity probes but does not work beyond ½"
Suggestions?
Miguel

Hi.
The caller identification is not DTMF.
You cannot use that chip.
Miguel

Hi. I do not have the schematic you want. Any photosensor alone can be read with a meter remotely. You have to run the signal from the light bulb location to the place you want to monitor its working condition anyway. Go fancy. Get a fiber optic leftover piece from the telephone company and touch on...

Hi.<p>"I am looking for the data output when one of the 4 arrow keys are pressed. UP DOWN LEFT RIGHT"<p>Assuming AT, 102 keys, mode 2 The answer in that order above is: E0,48 E0,50 E0,4B E0,4D BUT for EXACTLY what you said: "when pressed" !!!<p>There is a lot more involved!<p>Whe...

Hello.<p>The 4 arrows are not ASCII characters; are commands, as "Enter", "Print screen" "Page up"...as you will usually see the keys in other color.<p>If you are looking for the data a keyboard puts out when pressing those keys, there is many sets.<p>They are called sc...

Hi.
In your message above; if "THIS" means Nuts&Volts, you already did post a new one.<p>If "THIS" means Electronics Bench; it is at the very bottom of such board and takes a while to download. Just do not hit 'stop' until it ends by itself.<p>Miguel

Hi Russ.<p>One more time, go to:<p> http://www.zierick.com/ <p>Click on hardware, click on solder terminals check pages 37b for part number 7A-250 page 38 for part 29A-250 page 39b for part 29-250 And there is much more, you have to browse<p>Could not find the exact part at my workplace.<p>Good luck...

Hi Russ.<p>Check part number 707-1772. It is ¼" (0.25")<p>I will look for a few at my workplace tomorrow and send in an envelope.<p>Miguel

Hi again. Was checking my own post above, and it's easy to get very lost.<p>Retrying:<p>Go to: http://www.fastenergroup.com/index.htm Click the third circle, Down to "Solder terminals" Choose "Concord" Click "Product directory" Click "solder terminals" Scroll ...

Hi Russ.<p>Those lugs are usually supplied with the stud rectifiers package, they are the "stretched type"<p>Not easy to find, but<p>Go to: http://www.fastenergroup.com/index.htm Click on "Solder terminals" and look at part numbers 707-1XXX ¿Bingo?<p>Hope this helps. If you need ...

Here is an useful link:<p>http://www.avtechpulse.com/faq.html/<p>Enjoy,
Miguel