Portable Mic Preamplifier
Posted on Jun 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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An external power supply that gives a voltage higher than the highest expected rating of the...
A bridge circuit consisting of two SCRs and two silicon rectifiers furnishes full-wave power to...
The 2N2222 circuitry is a three-element, phase-shift oscillator circuit, designed to yield a...
This provides bidirectional speed regulation for small motors and requires no tachometer. The...
Designed to feed a low-frequency subwoofer speaker system, the amplifier is capable of up to 100...
Presented here is a Long Range FM Transmitter. This circuit is a super-sensitive, mini-powered FM...
This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency...
Simple Timer With 555 is one example of a simple timer and can be applied to electronic...
This is of course the simplest electronic code lock circuit one can make. The circuit uses one...
This circuit liquid level sensor is using a simple and common operational amplifier IC 741 used...
problem is my MOSFET gets realy hot. due to the circuit is using half bridge and no mosfet...
There are two main types: the most common is the Wein Bridge oscillator variety, which has low...
Merry Company (Micrellnc) introduced the industry's smallest and most powerful of the most...
As shown with a bridge input circuit phototransistor BPY62 power operational amplifier and can...
Circuit using the form shown in Figure 1-36, the feedback circuit and the bias circuit...
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