Replacing the Uno with the TrinketPro

Now that I have the TrinketPro working fine, and have the sketch and prototyped circuit for the bag movement alarm project using an Uno, I wanted to replace the Uno with the TrinketPro. There were a few small changes, as there are two pins on the TrinketPro that are not available:  #2 and #7.  Since…

Trinket Pro ‘unboxing’

As part of the hackaday.io Everyday Carry contest that I am (in part) building the bag movement alarm for, I need to utilize a Trinket Pro.  Which is fine, because the product itself is a pretty affordable ~$10, and it packs pretty much to same punch as an Arduino Uno. I ordered one from the…

Starting with an accelerometer: MPU-6050 / GY-521

For the bag movement alarm project, I got myself a cheap postage sized accelerometer.  The breakout board I purchased online is labeled GY-521, which I found out afterwards is just one of the many boards for the MPU-6050 chip.  The MPU-6050 is actually both an accelerometer as well as a gyro.  Pretty cool for such…