EAGLE Trivia Challenge: Why the ratnest?
Your challenge, if you chose to accept it, is to determine why EAGLE is showing a ratsnet connection on the far left of the PCB layout. The pads shown with the yellow unrouted line …
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EAGLE: Creating a Custom Library for your own components
When you start creating your own parts in EAGLE, you’re going to want to store them somewhere. Here’s how to setup EAGLE to use custom directories and how to create your own …
Read MoreWhen do you use the Arduino's Serial.flush()?
In the Arduino library, the Serial object has a method called “flush().” Often users go throwing it into programs without fully understanding what it does. It doesn’t help that …
Read More5 Myths Everyone Believes about Arduino (that aren't true)
Having spent the past 6 years writing code for the Arduino platform, I’ve noticed a trend in myths from both newcomers and veteran users. Here are the Top 5 Myths I see come up on …
Read MoreUnlike Speed Limits, Ohm's Law isn't a Suggestion
Getting started with electronics always involves a discussion of Ohm’s Law. What is this mysterious sounding law and how can you use it when building electronic projects? One the …
Read MoreElectronics: Introduction to Breadboards
Soldering every circuit you build probably isn’t practical. At some point you are probably going to want to use some type of temporary method to connect different components …
Read MoreAddOhms #7 - Comparing Arduino and Raspberry Pi
The seventh AddOhms TutorialCast has gone “live”. (Gone “uploaded” sounds wrong.) Being able to understand difference between an Arduino and a Pi is a critical point for many new …
Read MoreArduino: De-Bounce a Button with micros() or millis()
The Arduino is fast, humans are slow. When you push down a button, what seems like a single change to slow humans is really multiple presses to an Arduino. This is known as …
Read MoreArduino: Chasing LEDs with millis()
A popular LED project is the “Larson Scanner.” This scanner emulates the effect seen on KIT from Knight Rider and the Cylons in Battlestar Galactica. The code is usually written …
Read MoreArduino: Timing Code with Millis() as a Stopwatch
Since most Arduino boards do not have debug capability, this limits the programmer to using Serial.prints. A useful piece of information might be knowing how long certain parts of …
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