Unexpected demonic possession can completely ruin Christmas, particularly if it occurs while you're unwrapping your presents. So what better way to avoid paranormal party-poopers than by building an electronic field sensor into a standard Christmas card to warn of the presence of disembodied entities in a subtle and festive manner.
This project was inspired by a friend asking if I could make him a field based ghost detector. Since I usually send him a Christmas card with LEDs in it, I decided to combine the two and make a Christmas card with a built in ghost detector.
It uses a three stage cascade of common NPN transistors (BC547) to detect the slightest ambient electrical field and make Santa's eyes light up.
I did a search on Google for "ghost detector schematic" and immediately found a circuit that I remembered building when I was a kid. Just a simple ultra high gain transistor array. I hard-wired the circuit and put it into a suitably themed Xmas card.
It's quite amusing, since the eyes glow rather randomly when you move near or handle the card.
This project was inspired by a friend asking if I could make him a field based ghost detector. Since I usually send him a Christmas card with LEDs in it, I decided to combine the two and make a Christmas card with a built in ghost detector.
It uses a three stage cascade of common NPN transistors (BC547) to detect the slightest ambient electrical field and make Santa's eyes light up.
I did a search on Google for "ghost detector schematic" and immediately found a circuit that I remembered building when I was a kid. Just a simple ultra high gain transistor array. I hard-wired the circuit and put it into a suitably themed Xmas card.
It's quite amusing, since the eyes glow rather randomly when you move near or handle the card.
Hey Doc.
I have made 2 of your 9 volters , the first was in a plastic box just working well. made a second one and put it Inna cardboard gift box and have in works well, put the original in the same box set up and instead of working it's a dim glow from the he LEDs touch the antenna and the LEDs go off for a bit and relight and stay on.. Sir do you know what's going on?. Thanks for your Vidios and in advance for your help.. Bob H
creepy and funny
I ordered in a batch of BC547's after trying unsuccessfully to build this project with a couple of other transistor's. They are cheap and very easy to get on Ebay now, so I figured why not use the ones that Big Clive can get to work, and they work GREAT! I have made a couple of those circuits now but never had any rabbit ears left over from long long ago when we needed them back when I lived in Minnesota in 1969. So instead I simply soldered on some lengths of lacquered copper wire recovered from old power supplies I tore down for just the copper and what ever components I thought I may one day want to use.
I like that circuit there a lot of things could be used in that circuit, very clever there Clive. You should be a go- jillionaire by now, Tom.
1 circuit, 101 uses. Ghost detector, infrared light detector, crude amplifier and many more.
Hi can chance you could tell me how to do one with a buzzer as well. And a list off all the parts. Thanks love you videos
It only works if I move away from the antenna, not towards it. Why is that?
Hey bigclive looks like your circuit is designed to pick up negative changes. If you changed the transistors out, could it pick up positive changes? (Friendly ghosts… hehehe)
Hi Clive. Built using 3 cr2032.Mitch neater
i guess you could say, hes Sherlock Ohms.
Hi sorry just found this video and I lobe but what do you use for the antenna?
Interesting.
This'll be neat to tinker with!
A good sub for the BC54x/BC55x series in the US would be the 2N3904 (NPN) and 2N3906 (PNP). A 2N2222 would also work.
That's a scary Christmas card T_T