Maxim Integrated Products announced that its software-configurable digital IO products helped enable a 50 percent size reduction for the microScan3 Core I/O LiDAR-based safety laser scanner from SICK AG. Achieving the industry’s smallest design allows SICK, which offers industrial sensor-based solutions, to expand the versatility of the new nanoScan3 Safety Laser Scanner for machines and…

This tutorial will show you how to make a Laser based Intruder alerter which captures image of the intruder automatically without any microcontroller or programming.You may have seen few movies where there is a security system containing multiple laser rays flashing across the room which when interrupted triggers an alarm. We are going to try replicating that kind of arrangement using a single laser pointer and a couple of mirrors.  

The circuit presented here transmits pulses wirelessly to long distance (more than 20 meter) using keychain LASER (readily available in market). A transmitter generates continuous pulses that are fed to LASER. LASER blinks at the rate of pulse frequency and emits light pulses. LDR on the receiver side, detects this light pulses and reproduces it at the output. So the same pulses that are generated at transmitter side can be received at receiver side to longer distance.To begin with the first thing that is required for this project is to prepare LASER. So let us start with how to prepare a LASER. LASER key-chains available in the market are like this. To prepare it for the project we need to take out its anode and cathode terminals to provide pulses. In order to remove button cells and keychain part from backside of the keychain. You will see one small spring, which is cathode terminal. Connect one wire with this as shown in the figure below.

This system for security uses the combination of LASER light and LDR. The LDR module has an onboard potentiometer to adjust the sensitivity of LDR, so that it only senses laser light falling onto it.The concept is quite simple and similar to what we see in movies where antique, priceless ornaments are protected under laser lights.As someone crosses these lights, an alarm runs on to indicate unauthorised presence. This project works similarly.In normal conditions, where there is always laser light falling on the LDR, the LDR module always gives a high signal to microcontroller 

Laser is used to cut different metal sheets, glass, diamond and all other very hard things as this becomes very easy to cut using laser rather than using different blades. It’s one kind of CNC machine in which two stepper motors displaces the laser to calibrated distance. As one enters the dimension of plate (L X B) the…

An interesting project explaining how can one control speed of a stepper motor from a remote place without using any wires.  A LASER and LDR are used for this purpose. From the transmitter, low frequency pulses are sent to the receiver using LASER diode. On the receiver side, a LDR will receive these pulses which will further trigger mono stable multi-vibrator to regenerate same pulses. These pulses will drive the stepper motor through driver circuit. So as anyone changes pulse frequency from transmitter, the stepper motor speed will change accordingly. The project uses a pulse generator, LASER, LDR, monostable multi-vibrator, current drive, stepper motor, counter and OR gates.

A printer is an electromechanical device which converts the text and graphical documents from electronic form to the physical form. Generally they are the external peripheral devices which are connected with the computers or laptops through a cable or wirelessly to receive input data and print them on the papers.  Since the invention of the printing technology, a variety of technologies have been employed in computer printers. Broadly printers are categorized as impact and non impact printers. Impact printers are the type of printers in which a key strikes the paper to make a letter. The examples of Impact printers are Daisy wheel and Dot matrix printers. While non-impact printers do not operate by striking a head against a ribbon. Inkjet printers and laser printers are the non-impact printers.