I’ve been putting off home automation for a long time, but recently the planets aligned and I’ve built something. The main ingredients are Raspberry Pi 3B, Arduino Mega, MQTT and OpenHAB. RPi because WiFi, huge software support, Linux, file system, etc. Arduino Mega because low power, many, many libraries, huge I/O and cheap. Continue reading “Internet of House”
I’m building a cluster using Raspberry Pi derivative boards (Banana Pi). Jeff Geerling gave me the idea to make a little PCB with RGB LED and also a 5.5mm DC barrel-style power connector. Continue reading “Power Connector Adaptor for Raspberry Pi With RGB LED”
Here are a few notes on working with the uber-cheap ESP-01 WiFi microcontroller module with Ubuntu.
Continue reading “ESP8266 ESP-01 Module With Ubuntu”
This gadget steps up the game from leaving a light on at home when you’re out. Place it near a window to make it look like somebody’s at home watching TV.
For fun I made a dedicated geocache toy from an Arduino, GPS receiver and electronic compass modules and neopixels (RGB LEDs).
Continue reading “Arduino-Based Geocache Finder Toy”
DigiSpark is one of the cutest Arduino-related widgets around. It’s about the size of a postage stamp, plugs straight into your USB port and will probably cover most of your microcontroller project needs. The problem is that it doesn’t seem to play nice, out-of-the-box with 64-bit Ubuntu Linux. Continue reading “DigiSpark With 64-bit Ubuntu”
I bought a €40 “Anbere” brand IP camera from eBay to find that it can only be used to feed the supplied Microsoft Windows application. I need it to perform the simple task of serving a JPG through its web interface. This left me with two options: bin it or reverse engineer this shonky POS. I chose option 2. Continue reading “Hacking Cheap eBay IP Camera”
10 years ago I bought a radio for my workshop. The criteria were: FM, cheap and mains-powered. I forgot to add the criterion: works. The radio was really bad at tuning – be that finding a station or keeping tuned to it. So I decided to gut it and put my own circuit inside. Continue reading “Arduino FM Radio”
Last year I found some awesome Arduino pinout diagrams with full colour on the Arduino forums. They are all titled something like The Unofficial Arduino Pinout Diagram / The Definitive Arduino Pinout Diagram, etc. They disappeared from the Internet (pighixxx.com) in December 2013. With the help of the Internet Archive’s Wayback Machine I retrieved them. Fortunately they were distributed under a CC-BY-ND license, so here they are again in PDF’s for your download delectation. Continue reading “Arduino Pinout Diagrams”
The Saleae Logic is an 8 channel 24MHz logic analyser. Soon after its launch people in China opened them up to find that they are pretty simple inside and, as sure as night follows day, little workshops in Shenzen started producing clones impossibly cheaply and to be sold through eBay, AliExpress, etc. Continue reading “Saleae Logic Analyser Clone with Ubuntu Linux”