RF Cafe visitor Jim L. requested that I post this Build Your Own Vibrato article from the December 1957 edition of Popular Electronics. `Make like Elvis with an `electronic` throbbing guitar, ` is the pitch line. Vibrato, for the non-musically inclined, is the `wa-wa` sound of an instrument as it smoothly wavers in pitch about a central note.
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This circuit is for use with an electric guitar, but acoustical stringed instruments like the violin and cello are routinely played with vibrato effect by rocking the finger up and down the length of the string. In typical 1950s style, the project is built with point-to-point wiring rather than using a printed circuit board. If you own an electronic musical instrument or a conventional instrument equipped with a pickup, chances are that the vibrato described in this article is just what you`ve always wanted. A vibrato is a device which continuously and automatically varies the amplitude of the music at a low rate of speed, usually somewhere in the range of 6 to 15 times per second. For instance, it is a vibrato which produces the soul-stirring throbbing, especially in the bass notes, of a pipe organ. Construction. Layout and wiring are not especially critical. For convenience a turret socket was used to mount the oscillator tube, V1, and its components, but a standard socket and tie points will do as well. Miniature coaxial jacks, of the type found on most hi-fi amplifiers, were used at J1 and J2 for the output and input connections, respectively. If your setup requires something different, any conventional type of jack may be employed. Keep the power supply components well separated from the oscillator and modulator components, to prevent hum pickup - and orient the tube sockets for reasonably short lead connections. Make...
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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