This is a pretty simple project we are going to do. We are going to create a simple buzzer circuit where we can increase or decrease the volume of the sound that the buzzer outputs. Okay, now we can do this in two ways. We can first turn the potentiometer all the way to the side where it gives out almost 0G of resistance. When we start at near
Click here to download the full size of the above Circuit.
0G , the sound of the buzzer will be the loudest it will ever be, since the potentiometer`s resistance is the lowest at this point; thus, at this point, the circuit outputs the greatest amount of current which is fed into the buzzer. Now as you turn the the potentiometer so that the resistance increases, you slowly begin to hear the sound of the buzzer get lower and lower. Eventually at around 450G , you cannot hear the sound of the buzzer anymore. It dies out. The resistance of the circuit now is higher and the buzzer doesn`t receive enough current to play out sound. Similarly, we can start with the buzzer turned all the way to the side where it gives out 10KG . When you start at 10KG resistance, the buzzer does not output any sound, so you hear nothing. This is because the resistance of the circuit is too high, so the current is very low and is not sufficient to drive sound out of the buzzer. Now as you turn the potentiometer so that the resistance decreases, you eventually hear the sound of the buzzer. This occurs at about 450G . As you keep turning it more, you hear the sound louder and louder. Turned all the way to the side so that the resistance of the potentiometer is near 0G , you hear the buzzer the loudest. This is the way all volume sound manipulation occurs in hardware. This is the same way the volume of speakers are adjusted. So congratulations, you now know how to vary the volume of sound-outputting devices.
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: