Interferometer is best used in calculating the index of refraction of gasses and transparent matter (i. e. air and glass). Doing so requires counting each interference circle one by one. As a matter of fact, getting a precise measurement requires counting up to a hundred circles which is almost impossible because circles move quite fast even when the measurement arm is winded as
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slow as possible. Even though it is quite hard for human eyes to follow such rapid movement, it makes a fairly easy Optoelectronics application. For that reason, I have designed an enumerator (image on top) for our lab, as a final project for Linear Electronics II class. Even though I have built the box for counting laser interference and diffraction patterns, it can enumerate all sorts of patterns given there is enough light. Personally, I have successfully counted patterns on a wooden desk, a very fine wire grid, a stamped concrete wall, and even the patterns on a Turkish carpet. Using the adjustment buttons gives the ability to adjust the circuit to any possible pattern transition thus making it useful for counting all kinds of patterns on any object. For counting laser interference patterns like the ones to the right, this project provides an excellent resource. Not only will it be able to enumerate through the patterns at lightning speed (my LDR provided me with 30 switches per second), but it will also provide you with utmost tool for counting any other pattern and count them quite precisely. As I took a very straightforward approach into this design, the project content is below and all in one page, as you will easily be able to print this page and use it as a guide. As usual, every final project is accompanied by a great project report (to get a reward for all that hard work). The report itself is the ultimate...
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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