Vacuum Tube Preamp
Posted on Oct 17, 2012
New Circuits
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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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This Mini FM Bug Detector is basically a broad-band receiver. It picks up the complete band from...
The circuit is capable of charging a 12 volt component selection. When the battery voltage...
This simple circuit consists of only two timing components Rr and Cr, the NE555, and bypass...
A bridge circuit is used to produce a signal from the output of vacuum sensor IC1. IC2b provides...
An LM311 comparator converts a small analog signal to a digital level for the DC4046...
The amplifier feeds a brace of speakers with two LM3876 amplifier chip circuits (50 watts per...
The communications between commercial aircraft and the ground can be interesting, amusing and...
Although a simple crystal oscillator may be built from one comparator of an LT1720/LT1721, this...
This 860 MHz Phase Locked Loop (PLL) oscillator circuit is for 1200 MHz transverter`s local...
This 8 function serial Christmas lamp controller is based on the IC UTC 8156 from Unisonic....
The 2SK2975 was reportedly been discontinued by the manufacturer and the replacement part was the...
This article is in the "you can do it too" category. It`s not as difficult as you can imagine for...
MAX732/733 refers to the DC-DC current PWM step-up regulator. As to MAX732, output voltage is...
Dual power for each complex since load is supplied by means of two-way power Meanwhile, when the...
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