In this project, we will build an audio mixer, which is a device that can add different audio signals together into one output. For example, say, one audio input is a cappella, with a personG ‚¬ s lone voice singing and another audio signal is background music. With an audio mixer, you can combine the background music with the singing to have a
Click here to download the full size of the above Circuit.
n output as if both audio signals were together, in other words, mixed, which is the function of a mixer. This project will serve to teach you about mixers and how they can be constructed cheaply using a few resistors, potentiometers, capacitors, and a JFET transistor. It will do everything that a mixer is supposed to do: combine signals from different signal sources, with the capability of being able to change the volumes of the input signal sources as well as overall volume of the mixer output. A mixer is really nothing more than an adder. It adds all the different signals that are input into it and then combines the added signals into one. The input audio signal inputs are where the audio signals which are to mixed enter the circuit. This could anything from microphone input, to a music audio file, to a speech file, any type of audio input which can be connected to this mixer. The 1G‚ µF capacitors which are directly after the audio signal inputs are coupling capacitors. These capacitors serve to only let the AC aspect of the audio signal through and block the DC aspect. Only the AC aspect of the signal represents the audio of the signal. The DC is unwanted and would cause offset to the signal. Therefore, this is why we use these coupling capacitors. After these capacitors are 10KG resistors which are then hooked up to 100KG potentiometers. These 100KG potentiometers serve as volume controls. They control the volume...
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.....
characters left: