Arduino digitalWrite speedPreviously I looked at the speed difference between digitalWrite and direct port manipulation. It was a chance to check out a Saleae Logic Analyzer. Andrew at !Crash-Bang Prototyping took the analysis a step further. He broke down what is going on inside of digitalWrite().

This study is useful. When you’re ready to move beyond the Arduino IDE or the core functions, you can decide if you need your own version of digitalWrite().

Check out !Crash-Bang Prototyping’s “How Arduino digitalWrite Works – and why AVR is Faster“.

Deck out the rest of your Ghostbuster gear with a Ghost Trap. Dustin McLean from DIY Prop Shop from AWE me builds a trap in this quick 12-minute video. The build uses very basic materials: cardboard, popsicle sticks, tape, PVC, and spray paint. Of course, the tools used are just basic cutting and straight edges.

If you aren’t familiar with DIY Prop Shop, the show–as the name suggests–takes a DIY approach to building famous movie props. Totally fun to watch and get ideas for your projects.

Check out the Ghost Trap Build on YouTube. Who you gonna call?

 

Polymer Crazing via engineerdog.com

Ever notice when you over-stress plastic, the stress points tend to turn white? The color or type of plastic doesn’t seem to matter, does it? So what is going on? This awesome post from EngineerDog explains why stressed plastic turns white.

If you’re starting to work with ABS on your 3d printer, it will help to understand what is happening to the polymer chains. It’s a process called crazing.

One good reason to learn about crazing is there is a way to fix it. So check out EngineerDogs’ explanation for more.

Solder is the glue of electronic circuits. In addition to a permanent mechanical connection, solder provides an electrical connection. Not too much unlike glue solder combines two separate metal pieces with a bonding material. In this case, the bonding material is a metal or allow with a relatively low melting point.

When soldering together a circuit, the quality of the solder joint is crucial. Most people probably recognize the need for a high-quality soldering iron, like the FX-888D from Hakko, but about the other tools?

Building a modular soldering station is just as critical to making good solder joints as the actual solder itself.

Capacitor lifetime depends on the materials

Although not all applications are safety critical or mission critical, reliability is still a vital consideration for many electronic products. Making informed choices at the part selection stage can help ensure the product will perform correctly over its intended lifetime.

When choosing capacitors, properties such as volumetric efficiency, frequency stability, temperature rating or equivalent series resistance are often the primary factors that govern technology choice. In these cases, understanding factors affecting lifetime can help engineers make sure the product will deliver the required reliability.

On the other hand, a long operational life may be an essential requirement of the end product.

Continue Reading the full article, “Capacitor reliability can be improved with the right materials,” on Electronics Weekly.