Low frequencies predominantly cover our earths atmosphere. This range of frequency may be created by many different sources which may be quite unknown and strange, a VLF sensor equipment can be made to trace these frequencies for investigating the intriguing secrets hidden behind it. Steven Chiverton investigates. This is the vlf receiver circuit
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that ive upgraded and modified it senses ac fields lightening and even receives ship and aircraft radio to now this is what the circuit looks like without the upgrades and modifications, ive even used a gravity wave detector circuit added to it and also other experimental circuits This circuit looks very interesting, I guess it should start receiving signals at the infra sound levels, which may ideally indicate the many paranormal activities. Not very good at the technical explanation well ill give it a go the sensing signal booster on the far left hand side i bread boarded that to test it, to see if i can get more signal boost with it and the coil with its inductive nature pending on the amount of winds of thin wire and also the flux concentrator, this concentrate the em flux when a signal is induced into the coil and it increases sensitivity more, if you was to take it out the sensitivity and strength of signal would drop but then your in another mode as the circuit would still act as a lightening detector sensing lightening and the crackles will indicate that and the ac environment well it would sense that but at a lower response to it unless you re insert the flux concentrator core then the hum from ac mains will be increased a lot. now the vlf receiver section that will allow the signals from the sense head section to pass through, and very low frequency signals will pass through still but are filtered some more with...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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