Low Noise Microphone Preamplifier
Posted on May 1, 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 instrument is a one or two channel frequency synthesizer. DC to 35 MHz frequency with 0.1...
This simple and inexpensive circuit built around a popular CMOS hex inverter IC CD4069UB offers...
This circuit can detect smoke and a number of gases (CO, CO2, methane, coal gas and others) with...
The interaction design for the singing pig was to have a different song start playing when a...
The circuit presented here illustrates the fact that in spite of all kinds of new component and...
Here we describe a simple process to `put a voice on a sunbeam` and transmit it over a distance....
A very simple supercapacitor charger electronic project can be designed using the LTC3625 IC...
after it sets for awhile it runs for a couple seconds you can see injectors pulse then shuts off...
While working two-meter SSB from the Benson area, I decided that local terrain and the limited...
The circuit composition determines that the LED adopts anodic Nixie tube. It can use LQ5101BS...
This application note describes creating a dumb framebuffer with PAL composite TV output for the...
The purpose of this report is to provide background and findings or our senior project. We will...
After I built my KN-Q7 kitset 40m QRP single sideband (SSB) transceiver, described elsewhere on...
Remote control dimmer lights consist of two parts ultrasonic transmitter and ultrasonic remote...
AD574A is a high performance 12-bit successive approximation. A/D converter can be directly with...
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