This DIY foot switch controller simulates USB HID devices. It sends keypresses just like a keyboard or mouse. It can be used as an additional keyboard, let's say you'd like to do overhead photography and use both hands but also want to trigger the camera at the same time.
Full tutorial, code, circuit diagram & source files:
Adafruit was founded in 2005 by MIT engineer, Limor "Ladyada" Fried. Her goal was to create the best place online for learning electronics and making the best designed products for makers of all ages and skill levels. Since then Adafruit has grown to over 25 employees in the heart of NYC. We've expanded our offerings to include tools, equipment and electronics that Limor personally selects, tests and approves before going in to the Adafruit store. We pride ourselves on having great prices, the best customer service, technical support and fast shipping. We hope we can assist you on your journey of learning - At Adafruit we celebrate engineering happiness!