This setup is quite messy in terms of wires, so I`ve decided to remove both from their respective housings and place them in a nice, custom-built box. Right, so while I`m about to do that, aren`t there any other goodies toadd, like a VU meter and volume control Yes, which is what this project is about ” how to built a stereo amplifier from various components and parts.
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Everything is modular, so the system components can easily be changed, upgraded, replaced or have new goodies added. The PSU provides us with a standby rail (+5VSB, purple wire), which is used to power circuits that require power input during the powered down state of the unit. A red LED, powered through this rail, will indicate that the unit is plugged into the main power. This LED should then turn to green when the unit is actually switched on. For this function we must use the PWR_OK (+5V, gray wire) signal. Two interesting aspects of the required circuit are that we can use an H-bridge to switch the polarity applied to a bi-colour LED and that the switch for the H-bridge needs to be of a special configuration. I would like this amplifier to have a volume control. This can easily be achieved with a logarithmic potentiometer on the input, but by using a circuit based on the Philips TDA1524 chip I also get tone (bass & treble) and balance control. Details on how to build this module can be found here.
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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