Whether it`s truckthrottling over the highway, or an airplane roaring about the sky, or whether it`s a knock on the door or a purring of the cat or simply your heartbeats, the vibration level detector circuit explained here will sense them all and convert into beautifulsequencingLED light bar graph indications. The number of LEDs lit in the bar graph at any
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particular instantindicatesthe magnitude of the vibration force at that particular instant. Vibration is nothing but the ruffling of the air due a corresponding force generated from an external medium. Forexamplewhen we speak, our vocal chords vibrate and generate the corresponding patterns of disturbance in the surrounding air. When these air vibrations enter our ear, our eardrum also vibrate at the same frequency making it audible toour respectivesensory organs. The pitch of a vibration also becomes a major factor in determiningtheirnature and strength. Pitch and frequency are probably the two factors which make a particular vibrating information more distinct with their technical specs. As an example, a whistling sound may be shrill and might reach longer distances, but the grumbling sound from a mixer grinder even being much stronger won`t reach across longer distances. Though our ear isequippedwith pretty impressive detecting capabilities, these organs cannot tell you the exact magnitude of a particular vibration force. The circuit diagram below shows a rather simple configuration using the versatile IC LM3915 from TEXAS INSTRUMENTS, which aloneperformsthe function of sensing as well as displaying the vibration levels. Sound vibration force striking the piezo electric transducer generate tiny electrical pulses inside the transducer, or rather the device converts all vibrations hitting its surface into small electrical...
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....
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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....
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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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