Low-Noise Audio Preamp
Posted on Sep 12, 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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# The circuit can produce about 250-500mA at 2KV, depending on the transformer. # For C1, you...
The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of...
This circuit operates like the one shown in Fig, 57-4, The only differences are that the field is...
The following circuit is six LED stereo VU display diagram which build using Dot/Bar Display...
Sensors for lighting controls are either photoelectric sensing or presence detectors....
Apart from the diode (which replacement would need a PbS, Lead Sulphyde, galena cristal)...
18-year-old electrical engineer student, Chris Rieger, has been working on his levitating light...
Original components, when still good, are stable and not subjected to infant mortality. Of course...
D1, D2, C1, and C2 double the AC line in, charging C3 through R1 to approximately 320 volts. R1...
Even in the simplest of tube microphone circuits, there are different approaches to connecting...
As illustrated, the filtering and amplifying circuit composed of two parts. Wherein the filter...
Circuit is shown. (1) DC power circuit power switch S3, 220v AC voltage by T Buck, UR rectifier,...
FIG dual-channel circuit LM378 dual operational amplifier composed of Europe. Supply voltage Ub...
This Jammer circuit can be used indoor or outdoor and the coverage/range that offers is about 30...
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