Posted by & filed under Arduino.

In our last post we talked about wanting explore the use of two I2C based io expanders in an old school application. If it werent for the fact that there was a readymade lcd library for the mcp23017 I would have swapped the io expanders. No Pull-ups, No Pulldowns and no decent documentation on the… Read more »

The Adafruit Huzzah and the Sparkfun Esp8266 dev board.

Posted by & filed under Arduino, arm.

Background. I was asked to put together a 2 day class on the internet of things at PNCA so I suggested that we try out the Adafruit huzzah.  while I was looking for it I came across the Sparkfun Esp8266 “thing” and the Esp8266 dev board. I used the Sparkfun Esp8266 dev board to implement a… Read more »

Arduino code for Happy Accident 3

Posted by & filed under Intermediate Arduino Class.

/* Ping))) Sensor This sketch reads a PING))) ultrasonic rangefinder and returns the distance to the closest object in range. To do this, it sends a pulse to the sensor to initiate a reading, then listens for a pulse to return. The length of the returning pulse is proportional to the distance of the object… Read more »

Posted by & filed under Arduino.

It would be great if we could have a little group show at PNCA. I could bring this piece and the last class project.