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CR4 - Recent Forum Threads and Blog Entries

Recent content from CR4, The Engineer's Place for News and Discussion

Published: Sun, 23 Jul 2017 05:44:23 EST

Copyright: Copyright 2017

Installing Widget in

Sun, 23 Jul 2017 05:44:23 EST

im doing a iot project on but it just have a few widget type and i want add more..... the problem that i dont know how to install or add widget into my public freeboard. I have a link below and i want to install index on that link to my public freeboard in https://github

Ask Me About My LASIK Experience

Sun, 23 Jul 2017 00:44:49 EST

I got LASIK yesterday on both eyes to correct my farsightedness. I got a free consultation Tuesday and was scheduled that day for Friday. I've worn glasses for 20 years, and it's amazing to be able to read, make electronics repairs, delete spam from this site, all my favorite things without glasses

Over Speed

Sat, 22 Jul 2017 21:56:39 EST

Dear all whats the difference between over speed protection and over frequency protection in generator,i know when speed increase the frequency increase and vice versa, In other words why we need both. thanks for all

CO2 being increased each second of the day guys !!!!!

Sat, 22 Jul 2017 21:40:14 EST

My name is Thomas Campbell and I have to say the facts here to you guys b/c you have the answer to this major problems we are slowly facing now !!! one fact is our earths atmosphere is being put more CO2 into our air each second of the day by cars and companies too !!! two fact is that our trees whi

Transmitter with Transient Protector

Sat, 22 Jul 2017 09:38:38 EST

Hello, Some times there is an optional order code found while selecting transmitter for process instruments:With transient protection/or with out transient protection.Is there any consideration for selecting electronic circuit/transmitter with or without this option?

Scientists Design Promising New Cathode for Sodium-based Batteries

Fri, 21 Jul 2017 18:01:47 EST

Some additional battery research.

Silicon-based Anodes Promise Enhanced Battery Performance

Fri, 21 Jul 2017 16:18:26 EST

"Silicon anodes are receiving a great deal of attention from the battery community. They can deliver around three to five times higher capacity compared with those using current graphite anodes in lithium ion batteries. A higher capacity means longer battery use per charge, which is particularly cri

Distinct Voltages on Switch Redundant Power Supply

Fri, 21 Jul 2017 14:45:58 EST

Hello, I have a H3C S7506E Switch, that has two AC supplies (redundant), I want to connect one of the supplies on a 127 V source and the other one on a 220 V source. H3C told me that it should work, but they can't affirm it to me formally, because they "don't have that info". Interestingly, our m

What is the Right Approach to Analyze the Benefit of Retrofitting Unsupported PLC?

Thu, 20 Jul 2017 14:05:58 EST

Hi, Our magnetic separator for coal conveyor using unsupported PLC S7-200 (EOL), given the mtbf of PLC was quite good. Thank you.

Potential Free vs Powered Contacts

Thu, 20 Jul 2017 09:18:35 EST

Can anyone share a document / link for when to use Potential Free contact and when to use Powered Contacts. Tried to google but not getting information about powered contacts. Information is required for preparing I/O list to be submitted to system vendor.

Engineering the Perfect Bathroom

Sat, 22 Jul 2017 04:00:00 EST

If you’ve ever spent time lurking around the bathrooms of your local bars and restaurants, you might be struck by two things: A.) Women stand in line to use the bathroom much too long and B.) Women often leave the bathroom chatting away with a new friend. Now, thanks to scientists from Ghent

The Sailboat Diaries: Building a Bilge

Thu, 20 Jul 2017 18:07:06 EST

For what it’s worth, I’m several projects ahead of my blog updates. I just haven’t had as much time to blog lately as I would like. Let’s hope that changes in the near future. (Also, kicking myself right now for not naming this blog series Ship’s Log!) The bilge of my

End of Viper Production Signals Closure of FCA’s Conner Avenue Assembly Plant

Wed, 19 Jul 2017 13:00:00 EST

Fiat Chrysler Automobile’s Conner Avenue Assembly Plant is no stranger to hardship, having witnessed the decline of the spark plug business, along with the rise, fall, rebirth and ultimate death of the Dodge Viper. Changes to federal safety standards and declining demand will end Viper product

Guess the Architecture for 7/18/2017

Tue, 18 Jul 2017 18:00:00 EST

Do you recognize this week’s building? Care to take a guess?

Ford Steps Up to Sponsor Woodward Dream Cruise for 2017

Tue, 18 Jul 2017 13:00:00 EST

Last month, six-year Woodward Dream Cruise sponsor Chevrolet ended its relationship with the annual rolling celebration of the American muscle car, temporarily leaving the event without a corporate backer. Now, longtime drag strip rival Ford has agreed to sponsor this year’s Dream Cruise, taki

Woman of the Week – Alexa Canady

Mon, 17 Jul 2017 20:30:00 EST

Alexa Canady is the first woman and African American neurosurgeon in the United States. She grew up in Lansing, Michigan and overcame many obstacles over the course of her education and study. Canady's parents taught her and her brother about the importance of education and hard work as a child. Ca

Crossing the Uncrossable: A Tally of Those Who’ve Driven the Darien Gap

Mon, 17 Jul 2017 16:00:00 EST

Driving around the world ain’t easy. Visas, funding, language barriers, supply management, and keeping the vehicle running all require resourcefulness and resilience. But even the hardiest of round-the-world drivers tend to stay away from the Darien Gap, leaving just a handful of expeditions t

UAV Gaskets for Sealing, Flex-Fatigue Resistance and EMI Shielding

Mon, 17 Jul 2017 12:00:26 EST

Unmanned aerial vehicles (UAVs) need rubber gaskets that can protect UAV components from environmental conditions, flexural fatigue, and electromagnetic interference (EMI). Manufacturers of antennas, avionics, and airframes face different sealing and insulation challenges, but custom fabrication off

Why the Laser Engraving Industry is Here to Stay

Sun, 16 Jul 2017 04:00:00 EST

Laser engraving has transformed from a niche technology used by a handful of businesses and craftspeople to a widely used method for designing many aspects of one’s surroundings. Over the past decade, laser engraving has taken hold in many industries around the globe, finding its way into appl

Which Type of Facebook User Are You?

Sat, 15 Jul 2017 04:00:00 EST

As Facebook becomes an everyday part of our lives (with users spending as much as 30 to 50 minutes a day on the social platform), it is inevitable that we will develop traits similar to other Facebook users. Much like couples who begin to resemble each other after long periods of time, our long-term