» Topics » Questions »What else can replace an infrared motion sensor?

What else can replace the infrared motion sensor?

Topics / Questions
Added 16 comments
Hi people, I want to make a diagram of an indicator of presence (a person or a cat, to turn on and off the light). Question:
- Is it possible to do without an infrared motion sensor, and use other radio elements in the presence registration scheme?

For example, an antenna and a field effect transistor (response to pickup - 220 V, 50 Hz).

Found such schemes:



What are the disadvantages of such circuits, can anyone have a better circuit (without an infrared motion sensor), advise, eh?
Question \ topic is automatically published in the social. site network - stay tuned for answers there:
5
Added 16 comments

Suitable for topic

Related topics

Add a comment

    • smilesmilesxaxaokdontknowyahoonea
      bossscratchfoolyesyes-yesaggressivesecret
      sorrydancedance2dance3pardonhelpdrinks
      stopfriendsgoodgoodgoodwhistleswoontongue
      smokeclappingcraydeclarederisivedon-t_mentiondownload
      heatirefullaugh1mdameetingmoskingnegative
      not_ipopcornpunishreadscarescaressearch
      tauntthank_youthisto_clueumnikacuteagree
      badbeeeblack_eyeblum3blushboastboredom
      censoredpleasantrysecret2threatenvictoryyusun_bespectacled
      shokrespektlolprevedwelcomekrutoyya_za
      ya_dobryihelperne_huliganne_othodifludbanclose
16 comments
Author 0
Reply To quote A complaint
R555 The effect of Tulup or Tulub (Sergei Borisovich), why is it called that? Yes, give the scheme, I think it will be interesting for many to repeat the homemade work, people are waiting!
+1
Reply To quote A complaint
New Standard, yes IR sensors have an unpleasant effect. If you go dressed from the cold, it may not work. The effect of a sheepskin coat is called. And he takes the radio wave, even pack up in foil. About the economy. It can be done on IR rays at the intersection, but it will work on pulses of high duty cycle. Very economical and reliable. Synchronous detection. In my head, this scheme has developed a long time. By the way, I want to make such a homemade product and publish it on the site. I think many will want to repeat it.
Author 0
Reply To quote A complaint
R555 Infrared, it reacts to animals, responds to cars, tuning does little, and he also thinks for a long time when it is noticed in winter or after rain, his clothes screen infrared rays of a person, and he eats a lot in standby mode. In general, it is better than artificial intelligence in the form of a concierge, or the guard so far no one has come up with better))
+1
Reply To quote A complaint
And who didn’t like it? Ivan_Pokhmelev correctly wrote. The radio wave sensor will "see" through a drywall, thin brick, wooden. Checked. And they also have one feature. They work on the switched on DRL lamps and the like. On the vibration of surfaces reflecting microwave radio waves.
+1
Reply To quote A complaint
There are tons of options. For example, use a radio wave motion sensor. Argus 2 or 3, Wave -5. They can even be covertly installed. There are also ultrasonic and capacitive ones, I mean not with a network interference, but with a built-in generator. And what did not please the IR sensor? On a draft, on the air conditioner works? So there are IR sensors with customization. There is at the intersection of the beam, drafts do not interfere with them.
-1
Reply To quote A complaint
Consider that he can "see" through walls (within reasonable limits).
Author +1
Reply To quote A complaint
An interesting thing, cheaper than an infrared sensor, small and reacts to less interference, thanks for the recommendation. 5.8 GHz, well, almost a microwave - 2.45 GHz, hmm, oh, the idea is, what if you use an unnecessary oven for a self-made sensor))
0
Reply To quote A complaint
a microwave sensor to help you. There are mini non adjustable and adjustable.
on ali
[img] javascript: void (0); [/ img]
Author 0
Reply To quote A complaint
Yes, with field-effect transistors there is still that problem - keep in foil, ground the soldering iron, bracelets on hands with grounding, caps, foil slippers)), but in the end it still deteriorates
0
Reply To quote A complaint
For the power circuit is normal. For the sensor circuit, of course, it is necessary to maximize for a particular transistor, and the specific surrounding environment. Really, for a normal environment, Rz ~ 1 ... 3MΩ
0
Reply To quote A complaint
Quote: Pronin
you need to put the resistor kilo 10 o

But will not be enough?
+1
Reply To quote A complaint
Quote: New Standard
Thanks for the consultation, the RF sensor is interesting, but you will not have a circuit? An infrared laser is good, at 808 nm - in rubles somewhere around 15,000 rubles. at 1 W, they can steal, although it is not visible)). Well, in these schemes, it is necessary for a loved one to specifically direct the antenna to an object so that it does not react to everything and adjust the sensitivity, range

The infrared diode also stands in the control panel of the television ... There you just need to add optics (focus lens, mirror reflection and the corresponding receiver)
And in the presented circuits (with isolation shutter) do not configure anything ...
Quote from the Internet - <>
Author -1
Reply To quote A complaint
Thanks for the consultation, the RF sensor is interesting, but you will not have a circuit? An infrared laser is good, at 808 nm - in rubles somewhere around 15,000 rubles. at 1 W, they can steal, although it is not visible)). Well, in these schemes, it is necessary for a loved one to specifically direct the antenna to an object so that it does not react to everything and adjust the sensitivity, range
+1
Reply To quote A complaint
The presented schemes with a field input (with a suspended gate) are unsuccessful - they will respond to everything. An infrared LED (laser) with 0.9 ... 1 μk is invisible. You can also make a capacitive (RF) sensor. Will he react to a cat, it will be necessary to regulate-check
Author 0
Reply To quote A complaint
Yes, I wanted to solder myself from popular radio components, you can Soviet. The infrared sensor has disadvantages:
1-winter reacts languidly to the cold clothes of a walking object;
2-when it turns off, then again you need to move, which is annoying;
3-price is not always normal;
4-range up to 10 m;
5-indistinguishability to objects.
I understand that it’s also possible to make something from the laser, but the laser is visible, and you can shut it down
0
Reply To quote A complaint
The famous Chinese industry produces radio frequency and capacitive sensors. Or do you want to do it yourself?

DIY categories

We advise you to read:

Hand it for the smartphone ...