How to hack together a 5 V to 3.3 V voltage regulator with a few basic components.
Homemade WiFi exender using the ESP8266
How to turn an ESP8266 into a WiFi extender to allow web browsing and other internet activities further away from the home router.
How to program the ESP8266 from an Arduino Uno
How to program the ESP8266 using the Arduino UNO as a programmer.