High-quality low-noise preamplifier
Posted on Mar 28, 2007
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 hybrid circuit uses a mixture of transistors, an IC and a relay and is used to automatically...
A very simple circuit, that will find application in the case where you have a lot of telephones...
A simple solenoid driver uses incandescent lamp filaments as on-indicators to limit power...
1. THE INPUT CLOCK frequency fed into this circuit is divided by 2n-l. The circuit consists of...
The metal detector circuit is shown here that the limits represent the sake of simplicity for a...
One of the most insidious problems in an audio system is one or more ground loops. They not only...
A strobe light passes a brief, intense pulse of electric current through a gas, which then emits...
This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The...
The MCU is ATMEL 89C4051 CMOS Microcontroller having 4kB code memory, 128 bytes On-chip RAM and...
This is a circuit that will go off if the circuit detects any sound above a certain threshold....
Automatic emergency lighting circuit shown, it is suitable for families install yourself. Because...
B is a pure output CL mode power amplifier. Preamp input portion of the circuit does not use...
Figure (a) shows the output amplifier circuit 170W at 4 loads; LM4651 is a former circuit class D...
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