This post is a quick introduction to get an MPU9250 gyroscope, accelerometer, and compass module (so called 9 axis) connected and talking to an Arduino. I’m using a 5V Arduino Nano, because the description of this module says that it is 5V tolerant.

Markings on chip is: MP92 / W864A1 …

A quick guide describing how to hook up an ST7735 128×160 SPI TFT display to your Arduino and get the library to display something.

On the back it has two sets of pins and an SD card holder. I used the pins that already had a pin header soldered …

I’ve been playing around with the ESP8266 based Sonoff Wireless Smart Switch and I really wanted to upgrade the flash from the 1MB it comes with to 4MB so I can re-program it over wifi.

I’ve already have custom firmware running on it, but I don’t like …

I purchased some of these wireless smart switches from ITEAD, but didn’t like that you had to use their app and cloud server to use them. They use an ESP8266 microprocessor, so I wanted to see if I could re-program it to load my own firmware.

NOTE: Someone asked …

The ESP8266 ESP-12 module has a 2mm pitch, making it difficult to use on a breadboard with a 2.54mm pitch. Usually you are required to solder the module to a breakout board first.

This is just a quick ‘hack’ to connect the module to a breadboard for some testing …

This is a project I started, but never finished. I got distracted by the Raspberry Pi when that was released!. Even though it is unfinished maybe someone could get some value out of the current state of the project.

The idea was to create a controller for an aquarium, to …

NOTE: This is an older post, and instead of using a CD4050 it might be easier to use a bi-directional level shifter module.

In an attempt to get my Raspberry Pi talking to my Arduino I’m exploring various different options. The first was to just use the USB connection …