A contact copier (also known as contact printer), is a device used to copy an image by illuminating a film negative with the image in direct contact with a photosensitive surface (film, paper, plate, etc.). The more common processes are negative, where clear areas in the original produce an opaque or hardened photosensitive surface, but positive processes are available. The light source is usually an actinic bulb internal or external to the device Commercial contact printers or process cameras usually use a pump-operated where the original and the photosensitive surface are pressed together against a flat glass by a grooved rubber mat connected to the vacuum source. A timer-controlled mercury vapor (arc or fluorescent) light source is on the other side of the glass. (Wikipedia).
http://www.greenpowerscience.com/ DEMONSTRATION MODEL OF A FRESNEL LENS PERFECT FOR FAST DEMOS
From playlist FRESNEL LENS
Samsung Galaxy S5 - How to take a screenshot of your phone and text it to a friend
In this video I'll show you guys an easy way of taking a screenshot of your galaxy s5 and sending it to a friend via SMS.
From playlist Technology
MORE precise. MORE out of your downtime. MORE connectivity. MORE in touch. MORE business ready. The Lenovo ThinkPad Tablet is the perfect PC companion.
From playlist Lenovo: For Those Who Do.
Google Meet: Using the Mobile App
If you use your smartphone or tablet for work or to talk with family or friends, you can use Google Meet’s mobile app to virtually connect with a simple video call. The mobile app is easy to navigate and has many features that you can use such as sharing your screen and sending a message.
From playlist Google Meet
Multimeter Review / DMM Review / buyers guide / tutorial
A list of my multimeters can be purchased here: http://astore.amazon.com/m0711-20?_encoding=UTF8&node=5 In this video I do a review of several digital multimeters. I compare features and functionality. I explain safety features, number of digits, display count, accuracy and resolution. Th
From playlist Multimeter reviews, buyers guide and comparisons.
Never trust a photo copier...You MUST watch this ( CBS Nightly News Broadcast)
CBS Nightly News report on the dangers of used copying machines being resold. For collaborations and business inquiries, please contact via Channel Pages: http://ChannelPages.com/06886559
From playlist Cryptography, Security
Blender 2.79 Tutorial 4 : Blender Materials
Cheat Sheet / Files : https://goo.gl/rqArwb Best Blender Book : http://amzn.to/2n0HDg6 https://www.patreon.com/derekbanas I continue my Blender Tutorial series this time by talking a great deal about Materials. I also cover lighting, textures, show how to simulate glass, how to get lights
From playlist Blender Tutorial
Google Meet: How to Join a Meeting
Google Meet is a video chatting app that lets you virtually connect with people when you can’t meet in-person. To join a Google Meet, all you’ll need is a link or code sent to you. In this video, we’ll walk with you through the steps to join a meeting and show you the basics of a video cal
From playlist Google Meet
If you are interested in learning more about this topic, please visit http://www.gcflearnfree.org/ to view the entire tutorial on our website. It includes instructional text, informational graphics, examples, and even interactives for you to practice and apply what you've learned.
From playlist Photoshop
Citrix : Web Interface website for the Citrix Access Gateway
More videos like this online at http://www.theurbanpenguin.com Here we take a look at creating a Citrix Web Interface web site to support the Citrix Access Gateway. In doing so we will also look at the importance of backing up the webinterface.conf and using that as a template fro new site
From playlist Citrix
RedDotRuby 2014 - SOLID Design Principles in Ruby by Anil Wadghule
This talk covers following SOLID design principles in Ruby with live code examples. Single responsibility principle: an object should have only a single responsibility. Open/closed principle: an object should be open for extension, but closed for modification. Liskov substitution principl
From playlist RedDotRuby 2014
EEVblog #303 - Photocopier Extreme Teardown
Teardown Tuesday. What's inside an office photocopier? Dave only needs a screwdriver to find out...
From playlist Electronics Teardowns
DEFCON 16: Open in 30 Seconds: Cracking One of the Most Secure Locks in America
Speakers: Marc Weber Tobias, Investigative Attorney and Security Specialist -- Security.org Matt Fiddler, Security Specialist -- Security.org Many high security lock manufacturers claim that their cylinders are impervious to covert methods of entry including picking, bumping, and decodin
From playlist DEFCON 16
Don Norman: The Design of Future Things
February 9, 2007 lecture by Don Norman for the Stanford University Human Computer Interaction Seminar (CS 547). In this talk, Don discusses his latest book, The Design of Future Things, which is about the increasing intrusion of intelligent devices in the automobile and home with both exp
From playlist Course | Human-Computer Interaction Seminar (2006-2007)
29C3: Men who stare at bits (DE)
Speakers: nuit | Rena Tangens RFID-Studierendenkarten mit Fehlern Unsichere Studierenden- und Mensakarten. Eine wissenschaftliche Auswertung. Wie sicher sind eigentlich Studierendenkarten? Mit denen kann man nicht nur sein Mensaessen bezahlen, sondern auch kopieren und (s)einen Schrank
From playlist 29C3: Not my department
Homemade Copier - Mr. Wizard's Everyday Magic
SUBSCRIBE to Mr. Wizard's World here: http://bit.ly/mrwizard Learn how to build a homemade copy machine with Mr. Wizard. Subscribe now for more science, nature and technology clips from the 1980's Nickelodeon show, Mr. Wizard's World, every week on #WizardWednesdays.
From playlist Everyday Magic
Copy a Copy a Copy | Molly Springfield | The Art Assignment
Pre-order our book YOU ARE AN ARTIST (which includes new assignments!) here: http://bit.ly/2kplj2h This week we meet D.C. based artist Molly Springfield. Molly's graphite drawings transform texts into images, and her assignment for you asks you to consider how repeating a process can turn
From playlist Assignment Episodes
The Computer Chronicles - Laser Printers (1987)
Special thanks to archive.org for hosting these episodes. Downloads of all these episodes and more can be found at: http://archive.org/details/computerchronicles
From playlist Computer Chronicles Episodes on Hardware
How Does a Photocopier Become a Trumpet?
These photocopiers are taken apart and recomposed into brass trumpets. Each machine has 5 pounds of salvageable copper that can be reused. #MadeByDestruction Mondays 10/9c on Science http://www.sciencechannel.com/tv-shows/made-by-destruction/ Subscribe to Science Channel: http://bit.l
From playlist Made by Destruction
Adding Connections on LinkedIn
In this video, you’ll learn how to add connections on LinkedIn. Visit https://edu.gcfglobal.org/en/linkedin/adding-connections-on-linkedin/1/ for our text-based lesson. We hope you enjoy!
From playlist LinkedIn