Car active subwoofer
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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Professional schematic capture and PCB design software with automatic component placement, track...
When the phototransistor is stroken by IR light it conducts and the voltage between the 1Mohm...
Using the STK4038X audio amplifier IC, can be designed a very simple high power and efficiency...
An operational amplifier can be used as a convenient device for analog comparator applications...
This circuit"s frequency of oscillation increases directly with light intensity. The greater the...
Man has long wrestled with Time. Also, with knocking on things and not getting the time of day....
Simple and easy build of FM transmitter circuit. The circuit only require 2 transistors. Circuit...
This is the schematic diagram of basic oscillator circuit which using two transistors. When two...
Instead of the 555 timer IC we have two transistors back to back acting as a multivibrator. This...
The thermistor used has a resistance of 15k at 25 degrees and 45k at 0 degrees celsius. A...
A form of relaxation oscillator which comprises two stages that are coupled so that the input of...
A common LED driver requirements are: The LED string voltage and the input voltage is very wide...
Capacitors C2, C3, diode VD2, VD3 and other components simple capacitive half-wave rectifier...
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