2 Dollar Radiation Detector You Can Build. Beware of imitation diodes that don't have an H on them.
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- Опубліковано 17 жов 2019
- www.tvrepairinfo.com/
In this video I demonstrate how you can build a simple Radio Frequency Detector using only a detector diode and an LED. This simple circuit was sensitive enough to operate from my cell phone, my WIFI router, my walkie talkies, my microwave, my smart meter, my google assistant, and any other devices with enough power that transmit in the frequency range of my resonant antennas.
Here is a warning about using some aftermarket diodes that may not work in this project. In this video I used the 1SS86 Diode which worked well, but beware that unless the diode is made by hitachi, it may not work on the higher frequencies. Thanks to a viewer I've also learned that the 1N5711 also works.
• Inferior Diodes to bew...
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Here is a warning about using some aftermarket diodes that may not work in this project.
Next step. Make them for 5G ... say 28Ghz ... 10mm for full-wave, and then approach a 5G tower and see how close you need to get to light them.
Great project! Used this to make "On Air" LED lights on my door that are completely passive for my 2m ham radio @ 25w.
So it's literally just a couple of crystals and some wire receiving vibes. Incredible
If you could make them for 121.5MHz you could sell them for 10-20 bucks in aviation stores as novelties to monitor the blind guard.
High frequency rf doesn't penetrate as much as low frequency. Mmwave rf doesn't penetrate tinted windows, or leaves. To make it understandable for people who can't think logically. Here is an example. What do you notice when a car with a large sound system drives by your house? The loud treble? Or the bass?
Pretty sure you need a new microwave
Think of every device as a flame sure when you only examine and consider one or two flames you will note that the heat from these flames is small and safe now consider all devices in the neighbourhood the heat from the combined flames is larger and no longer as safe keep adding more people and more devices and you will reach a point where it is no longer safe.
One's talking to WiFi at 2.4GHz the other is talking to the phones GSM 900MHz
Thanks. I love it! What I like is that this is very physical and unlike obscure expensive EMF meters made in China contains no chips to cheat you or pretend anything what isn't there. In 1990th with the first cellphones there was a hype with phone ring indicators consisting of a keychain with a red LED in clear acrylic plastic, which likely works the same. Also microwave oven leak detectors only contain some kind of diode attached to a moving coil instrument.
When I worked for the power company we used RF detectors to locate buried power lines. But it ended locating more water lines that were grounded than power lines. LOL
3:38
Great vid, this toghether with a energy harvester will power a iot sensor easy. Thanks!
Congratulations Grants Pass. You made a very proffesional work. The best ever. Let me try to reproduce it and come back again to ask you some issues if they appear.
Red LEDs have much lower forward voltage requirements so would be more sensitive.
Cool video, got lost reading and writing in the comments.
Well by adjusting to correct frequency and uaing a optocoupler or transistor it can do wery sensitive detections ... i guess transistor will cause lots of noise from source voltage so using photo resistors this means extreemely sensitive signal tracker... with correct decoder this might end up to be all range signal tracker ... worth a try ..
With this you can make a cheap wireless hidden cam detector.
5:52
This is one of your most interesting presentations yet, really makes me realize how important antenna element length is. Perhaps this is why you had such trouble finding the "perfect" television antenna as you described in one of your earlier videos, since all the different translators are on different frequencies in different areas.