If you have the time and money then make this plate bigger, if possible. 5-meters would be ideal for a home base. Similar to the system used in modern aviation where an antenna array modulates the phase of an incoming signal. The commercial system is known as Commutated Aerial Direction Finding (CADF) where a ring of 18 identical antennas are each switched on in
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sequence, just like winding a rotary switch round and round so that one antenna is always connected to the receiver. Consider: If the receiver is connected to the take-off point in the centre of the above diagram, then any received signal will become phase modulated, the phase delay being dependant upon the direction of the received signal. Consider for one moment a signal comes from due North of the above array then Antenna-1 will receive signals that are part of one cycle in advance of all the other antennas. As the switch (commutator) is rotated then the signal fed to the receiver will gradually lag in phase more and more until Antenna -5 is selected. Continuing the switch rotation round, the signal will again begin to lead. The overall effect will give us a sine (ish) audio signal out of the receiver. If we now triggered an oscilloscope so that the NORTH antenna made the trace start (the trailing edge of Antenna-9 switching pulse), then the waveform received from the FM receiver would look something like this (after filtering): If the station received now came from due East then as the antennas are switched the received phase would advance until Antenna-3 was selected then continue to lag again. The greatest lag would occur when Antenna-7 was selected then the signal would again begin to lead again. If we still triggered the oscilloscope so that the NORTH antenna made the trace start, then the waveform received from...
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....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
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....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
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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