MeasurementBlues

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Senior Technical Editor

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MeasurementBlues

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  • 12.09.2016
  • Electronic products from hell
  • Dan really nailed it with his article on the three DMMs. The Keithley 2001 is still in products. The HP/Agilent/Keysight 34401A is finally being discontinued. The Fluke DMM is discontinued though I haven't found out when yet. Handleld DMMs likely have a shorter life cycle than bench/system DMMs, which can go into systems that last many years. Here's the link again. Reports are that it's intermittent. http://cms.edn.com/ContentEETimes/Documents/Martin/EDN/EDN_1992-1001_Design-it-Right-Part1_DMM.pdf
  • 12.09.2016
  • Electronic products from hell
  • Speaking of Design News (EDN's sister publication for 60 years until Aug. 1, 2016), December is DN's last print issue. http://www.foliomag.com/ubm-takes-several-titles-print/
  • 02.02.2006
  • Hardened Ethernet cable goes underground
  • It’s always been a mix of hard-core engineering with some hobby DIs. As I wrote in my Dream Job piece, it’s a matter of supply and demand. During my time as DI editor, I rejected some decent circuits, but then would accept some that weren’t as good. See the rest at: http://www.edn.com/electronics-blogs/rowe-s-and-columns/4442289/Design-Ideas-editor--The-dream-job-nobody-wants
  • 11.14.2016
  • LED lamp cycles on and off, why?
  • Update: Feit Electric sent a "replacement" LED lamp. It lacks the heavy heat sink of the older models, put out 650 Lumens instead of 750, uses 9 W rather than 13 W, is lighter, and make a low-level noise when turned on. My guess is the noise (which is low enough not to be bothersome) is from the switching power supply. I'll try to capture the audio and analyze it. Audacity should work.
  • 12.06.2016
  • Write a T&M article for EDN
  • So I hear. My only regret is that you're not writing the article for me. :-) I just ran across an EDN editorial by Dan Strassberg "Designing it wrong: The fax machine from hell" published in 1992. I'm going to post it and write a blog about bad designs. Your example sounds like a good one, as does Michael's blog about his heat pump and Glen Chenier's scope from hell.
  • 12.06.2016
  • Write a T&M article for EDN
  • MWagner_MA, link is fixed. Thanks for being my QA department. :-) You are now committed to write an article for EDN ;-)
  • 06.18.2013
  • Design Ideas Submission Guide
  • Be sure to see "Design Ideas editor: The dream job nobody wants." http://www.edn.com/electronics-blogs/rowe-s-and-columns/4442289/Design-Ideas-editor--The-dream-job-nobody-wants
  • 11.24.2016
  • Why do users buy test gear? – Part 3: Manufacturing
  • I made a visit to Teradyne a week or so ago. There, i saw large systems just for testing ICs. Floor space is a significant issue. Thus, anything that can be done vertically as opposed to horizontally is a cost saving to the user.
  • 11.14.2016
  • LED lamp cycles on and off, why?
  • I'm tempted to take a heat gun and go around the lamp to see if I can heat up different parts of the lamp. That might isolate the problem to the control circuit or the LED board. That's assuming I can find the heat gun.