Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light which is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers and lidar. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Alternatively, temporal coherence can be used to produce pulses of light with a broad spectrum but durations as short as a femtosecond ("ultrashort pulses").

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Arduino Star Tracker

“Track stars using Arduino, GPS, a laser pointer, and some motors! Story This project follows the system design for making a laser-pointer point to a star with a given date, time, GPS location, and the star’s celestial coordinates. Background …

Digital Level With Cross-Line Laser

“Hi everyone, today I’m going to show you how to make a digital level with optional integrated cross-line laser. About a year ago I created a digital multi-tool. While that tool does feature a lot of different modes, for …

Adjustable Constant Current LASER Diode/LED driver

“I was testing a couple of low-cost laser diodes that come from china and I was wondering why those diodes don’t have any protection/driver circuitry. Those diodes come with a simple series resistor for current control which is …

The Ultimate Beer Pong Machine - PongMate CyberCannon Mark III

“Introduction The PongMate CyberCannon Mark III is the newest and most advanced piece of beer pong technology to ever be sold to the public. With the new CyberCannon, any person can become the most feared player at the beer pong …

ESP32_Burninator

“An ESP32 project using two linear stepper motors and a burning laser diode. I came up with the project name from being a longtime fan of the homestarrunnerdotcom videos. Please don’t sue me. The project started when I grabbed …

Laser Shooting Game (Star Wars)

“In this article I will share arduino based star wars project that you can make on a budget. This project is a laser shooting game that will suit you as a homemade product. This project consists of 2 sub projects …

Laser Drawing Machine

“Draw phosphorescent light trails with a machine designed and built completely from scratch! The story: In between studying breaks during midterm week, my friend Brett and I designed and built this machine that utilizes a laser and mirror system to …

IOT Home Security System with Particle Argon

“Home Security at the touch of your fingers! Get notifications when your house door opens and sends an alert to your phone. Home security systems can be so expensive these days. It would be great if there was an easier …

Design and build a wireless laser engraver cum pen plotter using fusion 360 and 3D printing

“A couple of months back while checking out a few laser engravers on aliexpress, I came across some USB powered laser engravers, It was awesome that these could engrave on a variety of materials and also cut out shapes and …

Dr. Tape Head - Undead Media

“Dr. Tape Head is the perfect spooky companion when you’re working late in the lab! He uses Amazon’s Polly service to read out text from a Google Sheets spreadsheet, populated by the IFTTT service and gathered from Twitter …