Want to play around with the ESP8266? You’ll need a breadboard adapter, which allows you to connect the ESP8266 to a breadboard as you refine your design. Sure, you could just buy one, but where’s the fun in that?
[Markus Ulsass] designed a simple breadboard adapter for his ESP8266 that can be easily etched and built at home, but which has most of the features of the commercial versions. His adapter features a voltage regulator that can handle anything up to 7 volts and which has reverse polarity protection and a reset switch that puts the ESP8266 into flash mode, where it can be reprogrammed.