Selectable sensitivity Preamplifier
Posted on Jan 13, 2013
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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VUTRAX (pronounced View-Tracks) is the major professional Electronics schematic and PCB (Printed...
The range of this ac-voltage monitor is 100 to 140 Vac, with a resolution of 1 V. The speech...
We all know how a dip meter works and what it measures - the resonance of an LC circuit. The...
The 555 frequency can be varied via adjusting the voltage at pin 5. However, the range and...
With the phasing out of game, serial and parallel ports from modern computers and the ever...
If you ever wanted to integrate RFID functionality into your project, this small tutorial might...
The Boarduino`s small footprint made me want to see how small of a device I could whip up in an...
LM35 Smart Heater Controller SchematicMinuscule circuit of the electronic heater controller...
In appliance that appeal for aerial current, Nicad (NiCd) rechargeable array still has the angry...
Just about any power transistor can be used in this megaphone. Its suitable for boats, playing...
The circuit shown here is of a TV antenna booster based on the transistor BF180. The circuit...
The MAX2385 MAX2386 LNA mixer ICs are designed for CDMA cdma2000 1x and GPs applications. The...
Pressing the pushbutton of the transmitter, a sound and/or light alert is activated in the...
The all-analog circuit presented controls the rateat which a miniature turbojet engine can be...
Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being...
This project uses the similar technique to these products, however it can write a continuous...
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