Simple hidden wiring detector

A very simple hidden wiring detector. Anyone can collect it. All details are basically available. It is assembled using ultra-sensitive BC547 transistors. The power source is 6V, I personally use dead Krona batteries from multimeter. The arrow in the diagram is the detector antenna.

So, about the assembly:

Because The diagram is very simple, I assembled it with a canopy. The photo shows a diagram with a plug for the crown

It was customary to assemble a housing for it, I took a box from under the ballast of wall-mounted fluorescent lamps:

Then I pasted aluminum tape as an antenna:

I found some 1.5V batteries (I don’t know why) a little thinner than pinky batteries. I took 3 pieces, this is a 4.5V circuit that also works:

I dug holes under Light-emitting diode and the switch (the switch has already been inserted):

I stuffed everything inside and soldered the antenna to the tape:

Here is the assembled device:

But at work_))

Works at a distance of approximately 10cm from the 220 wire

But I'm looking for wiring in the wall))

This device is very sensitive, and I have no doubt that it will surprise you, because... it reacts even to weak electricity. field and the touch of hands!!!

I wish you a successful build!!!

come back

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Comments (40)

#1 Veent Guests 21 July 2011 18:56
3

I bought this thing for 30 rubles. Reacts to hidden wiring (Em. Field) Also measures alternating voltage from 12 to 220 V by touching one wire, not exactly but not bad either. At the same time, there are no batteries and the size is quite small. It’s more interesting to assemble it yourself, but not more practical
- Answer
1. #2 Sergey Guests 3 April 2020 23:10
  1
  
  Veent, don't mislead the people. About 20 years ago I bought it in Yaroslavl for 120 rubles. similar. Rubbish, the accuracy is oak.
  
  Answer
#3 NOTFRONT Guests 21 July 2011 19:09
1

A fool can buy it if there is somewhere...
- Answer
#4 Veent Guests July 22, 2011 00:59
2

Well, if there is somewhere to get imported transistors with high koff. gain, then you can definitely buy an indicator... And with such transistors I assembled a sensor relay, this is more interesting
- Answer
#5 [)eNiS Guests 22 July 2011 13:19
1

Well, maybe a touch relay)
- Answer
#6 STALKER Guests 31 July 2011 17:06
1

list all the parts:
3 bc547 transistors,
3 batteries 1.5v
And Light-emitting diode?
- Answer
#7 VVLAD Guests 15 August 2011 23:11
4

What other transistors can you take?
- Answer
#8 pashkevich Guests 24 August 2011 18:55
0

Please ask the author for contact soap or ICQ or...., hidden in profile.
- Answer
1. #9 Borga Guests 20 July 2019 14:32
  1
  
  I'm sorry... I originally read "in the snout"....
  
  Answer
#10 klon681 Guests 8 November 2011 19:55
2

I did everything according to the circuit, nothing happened, I turn on the diode, it lights up, I bring it to the wire, it lights up, I take it away from the wire, it still lights up only the transistors were in vain
- Answer
#11 NOTFRONT Guests 9 November 2011 22:19
1

poorly assembled or from faulty transistors. The scheme is working!
- Answer
#12 ddddddd Guests 15 February 2012 23:24
1

I also soldered everything according to the diagram and the diode is constantly on

Everything is working. I personally checked!!!

it should burn
- Answer