Requires that DC power be brought into the instrument, either through special cabling or an internal battery. Should not be done to collectible instruments if they didn`t come with onboard electronics. Conveniently implemented as a field effect transistor (FET) or bipolar junction transistor (BJT) follower, or perhaps an amplifier with modest gain. Can drive any impedance input,
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while eliminating stray capacitance in cabling and connectors. First made popular by Alembic in the late `60s and Music Man in the `70s. Active electronics inside the cable. Next best solution, allows a simple follower or amplifier to be placed very close to the instrument, for instance inside the plug backshell at the instrument end of the cable. Can drive any impedance input, while eliminating stray capacitance except for one plug and one jack. The instrument itself is unmodified. I have previously developed solutions of this type, which I call Active Plug technology. So-called "Active Cable" solutions are also commercially available. High input impedance amplifier. This is usually the least desirable solution, as it takes no account of cable capacitance. For some artists, of course, the cable is part of their sound and shouldn`t be messed with. But in applications where the desired signal is the voltage source inside the pickup, this just won`t do. Unless, that is, a way can be found to cancel out the cable capacitance. The remainder of this page describes a solution I`ve developed which does just that. Coaxial cable is commonly available and universally used for musical instrument pickups, often with 1/4" phone plugs on each end. But did you know that triaxial cable is also available Like coaxial cable, the triaxial form has an inner center conductor and an outer braided shield, but it also has an inner braided shield...
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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