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How to Make a Ghost Detector Circuit

Last Updated on December 10, 2022 by Swagatam 81 Comments

In this article I have explained to make a simple ghost detector circuit or a paranormal being detector circuit for quickly investigating a possibly infested area.

Introduction

Do you believe in the existence of ghosts? Well some of you may answer positively while some may just nod their heads showing sheer skepticism regarding the issue. Whatever may be the reactions; nobody just can’t deny or ignore the responses delivered from the circuit I have explained in this article.

Here we are discussing a super simple yet super sensitive paranormal activity sniffer circuit, which can be effectively and possibly used for detecting ghosts or similar supernatural existence within a range of 10 meters.
Many of these circuits may be built and posted at definite intervals for securing a certain premise having a large area.

The circuit incorporates an alarm at the output which sounds immediately on detecting a paranormal intrusion. The circuit is ideally suited for areas that are prone to ghosts or likely of getting infested with similar para-natural sneakers.

WARNING 1 – THE DEVICE HAS BEEN TESTED WITH POSITIVE RESULTS AND IS PROVED TO BE EXTREMELY ACCURATE WITH THE DISCUSSED DETECTIONS. FOLKS WITH WEAK HEARTS OR TENDER PERSONALITY ARE ADVISED NOT TO GO ABOUT WITH THIS DEVICE, BECAUSE THE DEVICE NOT ONLY DETECTS BUT ALSO COINCIDENTALLY HAS THE ABILITY TO ATTRACT THE PARA-BEINGS.

WARNING 2 – THE DEVICE CAN BE TESTED IN MORGUES, GRAVEYARDS, cemeteries etc. ZEDS ARE THE ONES WHICH ARE INSTANTLY DETECTED BY THIS DEVICE EVEN FROM DISTANCES MORE THAN 50 METERS. NO DOUBT CREATURE LIKE ZEDs WILL HATE THIS DEVICE….SO BEWARE.

Ghost Detection Concept

It has been found through experiments by many researchers that paranormal occupancy is strongly accompanied by RF disturbances ranging from a few Hertz to many Kilohertz.

These signals may be directly proportional to the hostile nature of the ghost. Zombies are found to be emitting the strongest signals and are therefore considered the most horrible among the lot.

The circuit of a ghost detector discussed here is typically configured for capturing the above RF emissions from these creatures and transforming them into more human understandable electronic indications.

Using 10 LED Bar Graph (New Update)

As shown above, this new ghost detector circuit using 10 step LED bar graph will measure the existence of a paranormal activity more accurately than any of the other circuits ever built.

It is hugely sensitive and can detect the presence of the smallest level of paranormal occupancy.

For low level vibrations, only a few LEDs will light up. However, more number of LEDs will start illuminating as the paranormal detection becomes stronger and stronger.

If the infestation is too high, you may find all the 10 LEDs illuminating along with the buzzer beeping....time to leave the area ASAP.

Making the Sensing Coil L1

The detector coil L1 is built by winding 100 turns of 30 SWG super enameled copper wire over a 1/2 inch ferrite rod.

The antenna can be simply a 6 inches flexible wire.

The test points 1 and 2 can be used to check the voltage levels using a digital multimeter or can be hooked up with an oscilloscope to analyze the paranormal waveforms.

Using IC LM324

A single versatile IC 324 is involved in the whole operation.

The IC is a quad opamp IC, meaning four opamps in one package.

accurate ghost detector circuit

Referring to the figure, the opamps can be seen configured as hi gain non inverting amplifiers.

All the opamps are configured as high gain signal amplifiers.

Tiny electromagnetic or RF disturbances which are typically found being generated during the presence of ghosts or paranormal activities are instantly picked up by the antenna of the circuit and are fed to the input of the first opamp stage at pin #9.

The signals get instantly amplified and are transferred to the subsequent stages for further amplification and enhancement.

The output of the last opamp is connected to an opto-coupler.

The optocoupler is a homemade type, incorporating an LED and an LDR fixed such that their emitting and detecting surfaces are placed face to face inside a light proof enclosure.

Here, the optocoupler is used for sensing the LED illumination that may occur when a certain paranormal activity is sensed.

The illumination produced over the LED is tracked by the LDR whose resistance falls with the LED light.

The fall in the resistance of the LDR activates the connected transistor at the output, which in turn actuates a buzzer or a horn indicating a possible ghost intrusion.

The whole circuit may be built over a small piece of vero-board and should be strictly operated with a 9 volt battery.

The whole system may be enclosed inside a plastic box with the antenna kept protruding out of the box.

Parts List

  • R1 = 100K,
  • R2 = 2M2,
  • R3, R4 = 1K,
  • C1 = 0.01uF ceramic
  • OP1 = LED/LDR assembly inside a light proof enclosure,
  • T1 = BC557,
  • B1 = Piezo Electric Buzzer

The above circuit was further modified by one of the enthusiasts Mr.Steven Chiverton, I have explained more regarding the procedures from

Improved Ghost Detector Circuit

The circuit board i made a bit longer and included the ghost detector and at the end i did the circuit you submitted and made sure the photo transistor was opposite to the ghost detectors led one picture is your transistor buzzer circuit i made it separately to test then added it to the printed circuit board with the ghost detector on it.

Here is another picture of your optocoupler buzzer circuit for the ghost detector,

i used matrix pins on the board like i do with many circuits.this eliminates the job of having to take the board out of the circuit to resolder wires , buzz wires go to buzzer and q1 wires go to phototransistor, and the positive and negatives go to switch that runs to 9 volts battery to positive buzzer to positive in and negative of buzzer marked with the minus symbol.

Hi Steven,

You have made this small circuit very special and all the effort you have put is amazing.

Thanks once again,

Swag

Thank you swagatam

It's your circuit your ideas I've upgraded thank you , now we have also the most sensitive lightening bolt detector for its size well have to test it out on a lightening bolt yet even though its very sensitive to the continuous sparking of the electric ignitor on the gas stove here it sounds awesome like receiving pulse rays well you should hear it different from just a hand held gas stove lighter with peizo electric sparks .

Ghost Detector Using Transistors

Here is the talking electronics 6 million gain circuit it may be a good ghost detector circuit to and by changing the bc547 to the bc517 you get a 30 million gain circuit as featured on youtube as a spirit detector but I haven't found any ghosts yet to test it on.

Transistor ghost detector circuit using 6 million gain circuit

010jpg is the top view of the printed circuit board for the swagatam ghost detector circuit. 006 jpg is a close up of another ghost detector i just made notice the home made optocoupler using the fairchild photo transistor and led at each ends of a short length of black heatsink tubing.

ive changed the 10n ceramics to 10p to see what results i get when ive completed it allcouldn't resist the temptation to build another of your ghost detector circuits, so ill have backup in the case one fails

i hope you find some of these pictures better for your site or collection, this ones half finished so i have to do the wiring then put the rest of the box together as its a 3 peace one and maybe put the buzzer this time in a different area , etc etc i plan to build your ac sensor next to when i get to it ill email you all the details when i get to that one

LM324 based ghost detector circuit diagram

This is how i redraw circuits in a more simpler way using student version circuit maker , note the ic shape in its proper rectangle configuration , drawn using the trax maker tool and the pins stretched into there sizes, and shaped properly using the arrow tool, the numbering for the pins was done 1 number at a time using text tool function then dragged into the positions using the arrow in the program

READERS ARE REQUESTED TO SHARE THEIR EXPERIENCES WITH THIS DEVICE. A PHOTO OR A VIDEO PROOF WILL BE GREATLY APPRECIATED....

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Filed Under: Sensors and Detectors Tagged With: Detector, Ghost

About Swagatam

I am an electronics engineer and doing practical hands-on work from more than 15 years now. Building real circuits, testing them and also making PCB layouts by myself. I really love doing all these things like inventing something new, designing electronics and also helping other people like hobby guys who want to make their own cool circuits at home.

And that is the main reason why I started this website homemade-circuits.com, to share different types of circuit ideas..

If you are having any kind of doubt or question related to circuits then just write down your question in the comment box below, I am like always checking, so I guarantee I will reply you for sure!

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Reader Interactions

Comments

Rakesh vargy says:
March 17, 2025 at 12:25 pm

isme Buzzer ka upyog kaise karu

Reply
Swagatam says:
March 17, 2025 at 12:43 pm

You can replace the LED with a DC buzzer.

Reply
Rakesh says:
March 17, 2025 at 9:53 am

sir circuit sahi banane ke baad bhi light band nahi ho rahi hai

Reply
Swagatam says:
March 17, 2025 at 12:44 pm

The LED should remain OFF when no RF is available in the atmosphere. I have tested this circuit, you can check the video here:
https://www.youtube.com/watch?v=u-_mEOF5NEA

Reply
Rakesh says:
March 17, 2025 at 12:59 pm

ready ho gaya sir thanks.

Reply
Swagatam says:
March 17, 2025 at 2:06 pm

That’s great Rakesh! Let me know if you have any further questions…

Reply
Rakesh says:
March 18, 2025 at 10:14 am

9 volt ki battery garam hoke discharge ho gai

Reply
Swagatam says:
March 18, 2025 at 2:30 pm

It means your circuit, or the IC has problems…
https://www.homemade-circuits.com/wp-content/uploads/2019/07/new-Bug-detecton.jpg
Parts List
100k – 2
2.2 meg – 2
1k – 1
0.1uF capacitors – 2
IC LM324 – 1.

Reply
Rakesh vargy says:
March 12, 2025 at 4:25 pm

हैलो सर मुझे इस घोस्ट डिटेक्टर में रूचि है पर इसको बनाने में मुझे ज्यादा नॉलेज नहीं है, मुझे इसका वीडियो मिल जाता तो शायद मेरे लिए बहुत सहायक होता?

Reply
Swagatam says:
March 12, 2025 at 4:44 pm

Hi Rakesh,
You can try this simple version, it is not so difficult:
https://www.homemade-circuits.com/wp-content/uploads/2019/07/new-Bug-detecton.jpg
The IC is LM324
Capacitors are 0.1uF PPC.

Reply
Rakesh says:
March 13, 2025 at 11:06 am

क्या यह बेहतरीन काम करेगा?

Reply
Swagatam says:
March 13, 2025 at 12:56 pm

Yes, it will work perfectly and it will possibly detect paranormal activities (in haunted areas), provided there are no other RF interferences such as AC high tension wires, mobile phone calling, or thunder storms.

Reply
Rakesh vargy says:
March 13, 2025 at 4:28 pm

Thank you sir.

Reply
normath says:
December 4, 2023 at 4:16 pm

saludos.vi tu circuito en youtu, lo usan para detectar iones como detectores de oro.el segundo circuito con lm324 funciona igual y como probarlo. puse resistencias de 10 megas .te felicito muy buena tu pagina.

Reply
Swagatam says:
December 4, 2023 at 5:00 pm

Thank you Normath,
I think you should try the following circuit. Here the connections are easier to understand. Don’t use 10m for feedback, 2.2m is sufficient, higher values will make it too sensitive.
https://www.homemade-circuits.com/wp-content/uploads/2019/07/new-Bug-detecton.jpg

Reply
Spandan says:
October 1, 2023 at 6:13 pm

Sir the Voltage is 9.63 V between the test points, after removing the antenna.

Reply
Swagatam says:
October 1, 2023 at 6:44 pm

This circuit needs a dual supply for supplying +9V and -9V for the op amps. Are you using a dual supply. And this can be implemented using two 9V batteries in series.

Reply
Spandan says:
October 1, 2023 at 6:56 pm

Two 9v in series will correspond to 18v …. I was using only one 9v battery before and now using two. Still there is no difference sir , the LEDs are lighting up as soon as I turn the circuit on….also I missed a point before, I am not using TL071 because it’s unavailable to me , instead I am using F4558 ic which has dual op amp in one package and I was only using one of its op amp and then cascading it to the second F4558 ic.

Reply
Swagatam says:
October 1, 2023 at 7:02 pm

You will have to use two 9V batteries in series (18V) for supplying the op amps and use the series center connection of the batteries to the line indicated by the Ground symbol. Without the dual supply the circuit might not work.
The opamp variant might also be crucial since this is a very sensitive configuration.
This circuit was taken from a popular old magazine so the circuit cannot be wrong.
If you want a single battery circuit, then you can try the following concept….I will explain you how to integrate with LM3525 later, once you have successfully built it.
https://www.homemade-circuits.com/bug-detector-circuit-rf-sniffer-circuit/

Reply
Spandan says:
October 2, 2023 at 8:21 am

Sir, could you provide me a simplified version of the 10 LED Bar graph ghost Detector circuit…

Reply
Swagatam says:
October 2, 2023 at 9:02 am

Spandan, Please first build a single LED ghost detector circuit successfully, then you can integrate it with a 10 LED circuit.
First build the following design successfully, then I will tell you how to integrate it with the 10 LED circuit:
https://www.homemade-circuits.com/wp-content/uploads/2019/07/new-Bug-detecton.jpg
The capacitors are 0.1uF/100V
The top most resistor is 2.2 M
middle two are 100K
the 4rth one is again 2.2 M
The LED resistor is 1K

Reply
Spandan says:
October 2, 2023 at 9:06 am

Okay Sir.

Reply
Spandan says:
September 29, 2023 at 10:05 am

Sir, I want the the voltage ratings of the top diagram ghost detection circuit using TL071 and LM3914 capacitors mainly 6.8üf and 2.2üf

Reply
Swagatam says:
September 29, 2023 at 10:09 am

Hi Spandan, The voltage ratings of the capacitors are all 25V.

Reply
Spandan says:
September 29, 2023 at 10:18 am

Can I use 6.8üf 50v and 2.2üf 160v…… because at the moment I only have these….

Reply
Swagatam says:
September 29, 2023 at 10:36 am

Yes, sure, having higher voltage ratings does not matter…

Reply
Spandan says:
September 29, 2023 at 10:46 am

Okay sir, thank you????.

Reply
Swagatam says:
September 29, 2023 at 11:21 am

You are welcome Spandan…

Reply
Spandan says:
October 1, 2023 at 11:11 am

I have one more question sir, those LEDs in the top circuit is connected directly to the 9v supply to LM3914 pins……does LM3914 has internal resistance in series to safely lower the current for the LEDs to function….or else they might burn up due to excessive current.

Reply
Swagatam says:
October 1, 2023 at 12:04 pm

Yes, the IC has internal resistors across its output pins, just make sure that the input dC is not above 9V so that the IC can remain cooler.

Reply
Spandan says:
October 1, 2023 at 6:03 pm

Sir, I made the top circuit but as soon as I turn it on all the LEDs lights up and remains ON.

Reply
Swagatam says:
October 1, 2023 at 6:07 pm

Spandan, Remove the antenna completely and check again. Also check the voltage at Test point#1, and let me know.

wondering says:
May 10, 2023 at 11:54 pm

top diagram what led can handle the 9v input

Reply
Swagatam says:
May 11, 2023 at 9:25 am

20 mA 5mm. I would recommend using 5V or 6V instead of 9 V.

Reply
skyboy says:
May 2, 2023 at 10:39 pm

Hello. This ghost detection device that you made with three transistors and took a photo of, its circuit is correct, but you have connected the bases of the transistors wrongly and this device does not work. You have to reverse the transistors and change their left and right bases together. Thank you

Reply
Swagatam says:
May 3, 2023 at 8:34 am

Hello, Thanks, you are correct, in the prototype image of the assembled PCB the emitter and collector leads must be reversed. By the way it was not built by me, it was built by one of my friends Mr. Steven. Maybe he might have realized later and corrected his connections.

Reply
Ranabir Bhattacharya says:
January 13, 2023 at 9:30 pm

I am messaging you for a important discussion about Spirit Box..
Many year’s ago Sir. Nicole Tesla described about white noises.
He said at that time 1N34 and related germanium diode’s are much sensitive to sense Entity’s Communication with Human’s by Radio..
I have a Ham radio’s L board..with IC chip 1895 and few transistors.
Today ,this 1895 I.C L boards and 6/7 transistors L boards present in market very small amount..But those boards are Stronger Signal Catcher with 1N34/1N34A/OA79 diode’s…
But unfortunately 5 pin gang which Select manually channels are missing in the market in India.. which is used in AM/MW/SW radio’s..
Radio is the main medium to communicate with Entity’s.AM(Amplitude modulation)
Instead of Gang capacitor which component I use to track that channel’s which select channel’s automatically ghostly White noises ..
I will say Automatically channel Selector/Automatic frequency Control.
Previously Sir Nicole Tesla and Thomas Alva Edison have described about…
I need your help…
Thank you..
Ranabir Bhattacharya..

Reply
Swagatam says:
January 14, 2023 at 9:21 am

Thank you Ranbir, I appreciate the valuable information that you have shared.
However, without a GANG condenser it is not possible to change radio stations, and there’s no direct replacement to GANG devices.
Instead of using a radio, you can use special white noise generators to detect ghosts.
I have an article on white noise generators which you can read here:
https://www.homemade-circuits.com/white-noise-and-pink-noise-generator-circuit/

Reply
Dewey Edwards says:
January 6, 2023 at 11:59 pm

In the first drawing of the 10 led bar graph (New Update) I am having trouble finding a 6.8 uf capacitor listed in any of the available capacitor kits. Is there another one that will work in it’s place without sacrificing sensitivity?

Reply
Swagatam says:
January 7, 2023 at 8:54 am

The capacitor value is not critical. You can try any capacitor between 2.2uF and 10uF

Reply
SKYBOY says:
September 19, 2022 at 2:08 pm

Please tell me which of these two circuits is more powerful, I want to make it? Is the one with transistor better or the one with IC?

Reply
Swagatam says:
September 19, 2022 at 6:10 pm

The one with the IC is the more powerful one. However it is too sensitive and get disturbed with other atmospheric noises. I would recommend to you try the following circuit instead:

Ghost detector circuit

Parts List
capacitors = 0.1uF/100V
Resistors = 2M2 2nos, 100K 2nos, 1K 1no.
IC is LM324

You can also try the following circuit for an advanced 10 LED indication.

https://www.homemade-circuits.com/wp-content/uploads/2021/07/9-LED-RF-sniffer-circuit-compressed.jpg

Reply
Endless says:
February 2, 2022 at 1:10 pm

Hey sir should I use 2m resistor at place of 10m ?

Reply
Swagatam says:
February 2, 2022 at 1:36 pm

You can try 2M also initially…10M will increase the sensitivity a lot.

Reply
Ranabir Bhattacharya says:
October 9, 2022 at 8:53 pm

Can I add a buzzer in first circuit given to @Endless a colourful Image that is LM 324 IC ,2.2 m (R),100k (R),104pf,& l.E.D(1)
If yes please say connection of the Buzzer in said circuit.

Reply
Swagatam says:
October 10, 2022 at 9:39 am

The connection of the buzzer i shown in the first circuit. You can see an LED and LDR tightly packed inside a lightproof enclosure, and a BC557 transistor T1 is attached to the LDR with a buzzer.
If the circuit looks difficult to you, you can try the following circuit:
https://www.homemade-circuits.com/wp-content/uploads/2019/07/new-Bug-detecton.jpg

The capacitors are 0.1uF PPC type.
You can replace the LED with a piezo buzzer

Reply
Swagatam says:
October 6, 2022 at 9:36 am

Yes that’s correct!

Reply
Ranabir Bhattacharya says:
October 6, 2022 at 2:22 am

It’s 103 pf I think

Reply
Swagatam says:
February 1, 2022 at 8:11 pm

Do you mean C1…it is 0.01uF not 0.1uF

Reply
Beant Singh says:
February 1, 2022 at 7:46 pm

Close to pin 8 and 10m resistor black color capacitor im not sure about value as its not clear in photo but its there

Reply
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