The purpose of this page is neither to give a comprehensive review of this popular theremin design, nor to be an introduction to the fascinating and quirky world of theremins in general. If you`re wondering `What the heck is a theremin `, check out the links on the index page. That being said, there are a few comments that bear making before we g
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et on with improving an already excellent design. The "Theremax" is a nice implementation of the classic Theremin idea. It does everything that the more traditional designs do, plus it contains added circuitry (i. e. "frequency- to- voltage converters, " or more simply F-V`s) to convert the pitch and volume signals into "CV" (constant voltage) signals that can be used to control external devices. For this reason its designer has opted to call it a "Gestural Controller. " Theremax handles volume unlike any other design I`ve seen. Rather than using a simple LC circuit that is detuned by hand proximity, it employs a separate oscillator pair with its own frequency-to-voltage converter to effect the volume change. The result is a dynamic range vastly greater than that afforded by previous designs such as the SWTP design informally adopted by TECI (Theremin Enthusiasts Club International). Theremax uses velocity (derivative of volume) to modify the sound by introducing asymmetry (and therefore even-order harmonic distortion) into the VCA. The idea here is to give a feeling of articulation on notes that are played with high velocity, much as a piano sounds different when struck hard than when played softly. The "Timbre fader" was another feature that convinced me to buy, work with, and help promote this fascinating device. This allows a transition between the classic sine-wave sound, and a harder, more penetrating square-wave...
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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