By separating the internal and external cooking procedures, a perfect steak with no internal temperature gradient can be easily achieved. Cooking sous vide provides reliable, consistent, and precise results every time. An ESP8266 wifi chip was used to monitor and maintain the temperature controlled water.
Tired of using a spliced USB cable or combining batteries to achieve a desired voltage, an inexpensive boost-buck converter was paired with the input from a laptop power brick to supply variable voltage.
Before the ubiquity of powerbanks, there was nothing on the market to provide longer battery life for portable electronics. Connecting a female USB connector to four rechargable AA batteries opened up a new world of extended iPod playback.