Pmod Communication: Serial Peripheral Interface

A while ago, we learned that one of the ways that Pmods are able to communicate with their host board is through SPI. We learned then that serial peripheral interface is a type of communication protocol where the “master” board and the “slave” device (in this case, a Pmod) are able to send bits of data to each other at the same time with the host board controlling the timing of the communication. Although this is a nice overview, it is my personal experience that theoretical overviews are not the most helpful in actually implementing what we are learning. This begs the question: how do you use SPI? Lets find out!

Proximity-Sensing LEDs Part 1: On a Breadboard

Who doesn’t love interactive LEDs? This project started because I wanted to make a simple circuit that I could later move on to a printed circuit board (PCB) that I designed myself. (The original goal was to learn PCB design and layout.) This idea was given to me by my manager, Larissa, and was inspired by Evil Mad Science’s Octolively. Being an analog enthusiast, I came up with my own design that doesn’t use any ICs.

3D Modeling with Blender

We have made a few posts showing off our 3D printers and some of the classes on 3D printing that we have done here at Digilent. Garrett Mace from macetech.com showed us some of the basics on how to use various 3D modeling software like AutoDesk Inventor, Autodesk 123D Design, OpenSCAD, MeshMixer, and SketchUp. Today, I’m going to introduce some of the basic modeling tools available in the free but robust Blender.

WF32 Pin Diagram

I’m a big fan of the chipKIT WF32. It’s a powerful little board with a WiFi card and SD card reader built in, but there’s a lot more to this board than meets the eye. There are a ton of communication lines, external interrupts, output compare pins, and more hidden in all those GPIO pins, but how do you tell what is what? That’s where the WF32 pin diagram comes in. I’ve compiled, color coded, and listed what each pin is capable of.