Edn.com
#46

EDN

Online edition of US print magazine. Electronics applications, products, technology and design techniques. Archived with free, full-text access. Range of free ...

Link: edn.com

  • What you don’t know about #LED light intensity curves for grow light apps: https://t.co/6TxzcwyZdu

    What you don’t know about LED light intensity curves for grow light apps |

    edn.com 23 Apr '16, 11pm

    The light intensity curves for LEDs, regardless of whether they are collimated with a lens or reflectors, follow a bell shaped curve (often referred to as a “Lambertian“ curve). The 50% intensity point for an LED with no optic (bare LED) is virtually always at approximately 120 degree...

  • #OnThisDay in #TechHistory, @YouTube co-founder Jawed Karim uploaded the 1st video to the video-sharing website:

    1st video is uploaded to YouTube, April 23, 2005

    edn.com 23 Apr '16, 2pm

    The first video uploaded to YouTube, “Me at the zoo,” was posted on Saturday, April 23, 2005, at 8:27 p.m. by site co-founder Jawed Karim under the user name "jawed." The 19-second video was shot by Yakov Lapitsky at the San Diego Zoo and shows Karim standing in front of several eleph...

  • Need an alternative to a simple on/off button that is cost-effective? @EDN has the solution!

    Rethink the button: An inductive-sensing approach

    edn.com 21 Apr '16, 3pm

    Mechanical buttons on appliances and consumer electronics use a resistive contact solution. Mechanical solutions rely on the proper functioning of a mechanical button and its moving parts, which are susceptible to long-term reliability issues or sticking due to liquids or other contam...

  • A dark side of manufacturing is uncovered in this #teardown of really bad #power supplies:

    Teardown: 12V AC adapters – The Horror |

    edn.com 18 Apr '16, 11pm

    In the name of science, I introduced three of the worst 12V adapters (from My kingdom for a 12V adapter ) to my bandsaw. What I found may shock you. Note: All pictures can be zoomed or opened at full size in their own tab. First on the chopping block, the “EH1205”. Wait! What’s this? ...

  • Former Agilent engineers developing a wireless oscilloscope

    edn.com 15 Apr '16, 2pm

    A pair of former engineers from Agilent (now Keysight) Technologies are working on an oscilloscope that will connect to an iOS device for its user interface. The Aeroscope , conceived by Alexander Lee and Jonathan Ward, looks like the kind of device that you'd use on home projects or ...

  • Using a DSO's FFT, you can measure a noise signal's frequency spectrum.

    Quantify noise with a DSO

    edn.com 05 Apr '16, 3pm

    Electronic devices such as resistors, linear amplifiers, and digital-to-analog converters (DACs) generate noise. When qualifying a component, circuit, or system design, you must measure the circuit's noise to determine how well your device performs. Because a digital storage oscillosc...

  • Autonomous cars someday, autonomous transport now

    edn.com 08 Apr '16, 10pm

    The autonomous car is getting lots of press, and generating considerable controversy, for its potential to replace humans behind the wheel. But it remains only a potential; the technology is not robust enough yet to start building a significant presence on the world's highways and byw...

  • Look behind the #wireless badge at #ESCBos to get a leg up on hacking it! Badge teardown here:

    Teardown: Behind the ESC collector's badge

    edn.com 05 Apr '16, 7pm

    In the lead up to this year's Embedded Systems Conference, Boston, there is a lot of buzz about the limited-edition, mesh-networked attendee badge that will be available to a lucky hundred or so attendees. This clever item comes from the same minds that created the networked CapNet pr...

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