This video is of the complete assembly of an electrostatic field ghost detector that uses a common cheap TV antenna widely available from dollar store type shops. I got mine from Poundland.
It uses a super high gain Darlington array of common NPN transistors with the input biased very slightly to make it more sensitive.
I designed this for a friend who does a lot of ghost hunts. You can see his website at www.walkingwithghosts.com
The two antennas give a good responsiveness to ambient electrical fields.
In this design I used BC547 transistors because they are pretty much the standard NPN transistor used by geeks in the UK. You should be able to substitute different transistors although their base, collector and emitter pins may be different.
The use of a reverse biased red LED to give a tiny bias current may seem a bit odd, but it gave the best results in my experimentation.
It uses a super high gain Darlington array of common NPN transistors with the input biased very slightly to make it more sensitive.
I designed this for a friend who does a lot of ghost hunts. You can see his website at www.walkingwithghosts.com
The two antennas give a good responsiveness to ambient electrical fields.
In this design I used BC547 transistors because they are pretty much the standard NPN transistor used by geeks in the UK. You should be able to substitute different transistors although their base, collector and emitter pins may be different.
The use of a reverse biased red LED to give a tiny bias current may seem a bit odd, but it gave the best results in my experimentation.
Where can gallium arsenide leds be bought please?
How can I use this circuit to start a cat ball lighting circuit? The ball is started by a shock sensor. I would like to use this sensor instead. I think maybe a relay to convert analog to a digital I/O but would not have any adjustment for the threshold.
This video is officially 9 years old. Happy Halloween Clive!
Because of the title "ghost detector" and Halloween approaching is probably why I got this recommended to me lol
I figured it out you sly one
I can't get it to work is it leds I'm using
Did you test this out in some haunted place? You should post a video of you tests.
So much more convincing than say a photo or a real-time sighting. Niice
Hi Clive, I know this is an old video.
I built this circuit and run it off a 9v supply and it works great.
The circuit also works as it should when I add an Arduino into the project box, but once I run them from the same power supply or even just share the same ground your circuit plays up.
I have added a capacitor and another led to the supply and also to the earth side for extra filtering and the circuit still works great, but once again when I add the Arduino the circuit plays up.
Do you have any ideas how I can add the Arduino without compromising the circuit?
As to not interfere with the sensitivity I am using the Arduino and a LDR to monitor the led so your circuit is not impeded.
Is it possible to solder a speaker (or even an AUX cable to pc) instead of the LED indicator in order to listen to the noise that gets picked up by the environment? Maybe you could give the ghosts some voice…
Could I use a D2625 NPN transistor?
It’s not a ghost detector probably a radio signal sensor, if any frequency is broadcasting it probably picks it up ..
I would like to see more ghost detecting devices made or taken apart. BUT so many of them seem like a scam (even if ghosts exist). like 10$ radios with a wire cut and sold for hundreds. or MadLabs junior theremin kit(15-20$) put in a pvc tube sold for a few hundred dollars.
I don't want you to waste your money but they seem like interesting devices.
(•‿•)👍
fun stuff
Hello Clive, being we have simular minds, seeing ghosts are all in the mind, like a radio or tv, those signals are passing through us but we cannot see or hear them without a tuned receiver, we humans have a tuner, this will explain why humans can see them but not electronic cameras, only organic old fashion film can, you need a organic detector like gas tubes or chemical reaction of some kind