Very Low Frequency VLF Detector Circuit

Description: Low frequencies predominantly cover Earth's atmosphere. This range of frequencies can be produced by various unknown and unusual sources. A Very Low Frequency (VLF) sensor equipment can be developed to detect these frequencies for investigating the intriguing secrets hidden behind them. Steven Chiverton conducts an investigation into this matter. This is the VLF receiver circuit that has been upgraded and modified; it senses AC fields, lightning, and even receives radio signals from ships and aircraft. The circuit design without the upgrades and modifications has also been presented. Additionally, a gravity wave detector circuit has been incorporated, along with other experimental circuits. This circuit appears to be quite interesting, as it may begin to receive signals at infrasound levels, potentially indicating many paranormal activities.

The sensing signal booster, located on the far left side, has been breadboarded for testing to achieve a greater signal boost. The coil's inductive nature is dependent on the number of turns of thin wire and the flux concentrator, which concentrates the electromagnetic flux when a signal is induced into the coil, thereby increasing sensitivity. Removing this concentrator would decrease sensitivity and signal strength; however, the circuit would still function as a lightning detector, responding to lightning crackles. The circuit will also detect AC fields, but with a reduced response unless the flux concentrator core is reinserted, which significantly amplifies the hum from AC mains.

The VLF receiver section permits signals from the sensing head to pass through, allowing very low frequency signals to be filtered further using 0.1 µF ceramic capacitors. While it can still detect AC mains at a lower response without the flux concentrator core, it is advisable to keep the core in place for maximum sensitivity when in an electromagnetic environment. It is also noted that battery-operated watches can easily be sensed, causing loud ticks as the electromagnetic pulses from the watch are amplified throughout the circuit. The VLF receiver circuit operates on a 9-volt battery, which is shared with the front sensing head section, while a second 9-volt battery powers the audio amplifier section. This design is beneficial because switching off the VLF receiver section does not completely cut off the audio amplifier; some signals may still be received.

The flux concentrator consists of several barrel-shaped toroids placed over a pole-shaped core and inserted through the coil. The circuit can also function as a radio or tape player pickup when brought close to the sensing coil, as it can detect voices from speakers and even electromagnetic fields generated by devices like camcorders.

The VLF receiver circuit is thus a versatile tool for detecting low-frequency electromagnetic signals, lightning activity, and even audio signals from nearby electronic devices. This capability makes it suitable for various applications, including scientific research, paranormal investigations, and educational demonstrations. The careful design and modifications enhance its sensitivity and functionality, making it a valuable instrument for exploring the unseen world of low-frequency phenomena.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 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 the 0. 1uf ceramics then it will still sense ac mains at a lower response with the flux concentrator core removed than it would with the core left through the coil so if your outside the electromagnetic environment leave the core in for maximum sensitivity, good idea noty to wear any battery operated watch as mine gets sensed so easily with my other 2 vlf receiver circuits and your ears will get a pounding from the loud ticks as the em pulses from your watch are greatly amplified through the whole circuit and the em signals from your watch are very low frequency signals so these signals will pass through the vlf receiver circuit to unimpeded, and the last circuit is the audio amp section so you can plug head phones in to listen, also the vlf receiver circuit takes a 9 volts battery and its input voltage is linked to the front sense head section so they can both share one 9 volts battery the second nine volts battery powers the audio amp section and its good this way, cause if you switch off the vlf receiver section the audio amp section appears to still be using some, of the circuit when power is removed from the vlf receiver section and you will still get some signals coming through it some how and ive got these same results with the first 2 other upgraded modified vlf receiver circuits and it can still sense em pulses from a ticking watch to but at a lower response to, the flux concentrator is made up of a number of barrel shaped toroid slipped over a stick or a pole shaped core and inserted through the coil, the circuit also sounds like a comic receiver for weird signals to with the core taken out so it dose what i think a vlf receiver dose then.

the sense head setting has been constructed onto a bread board and tested with a already made vlf receiver with audio amp i forgot to mention the circuit also acts as a pick up as a radio or tape player when brought close to the sense coil the coil and circuit pickup the voices from the speakers of any tape player and may also do the same for a telephone also when i brought my handy cam close to it it sensed the em fields generated by it to