Great low-cost, open-source “sip-and-puff” interface to control toys for people with and without limited mobility! Via Bobpardiso.com
Sip-and-puff is one of many ways someone can control a device without having to use their hands, and is a useful method for some people with certain disabilities. A puff is blowing into the tube, and a sip is sucking from the tube. In both cases the required pressure is tuned to the user for ease of use and can be very light to lessen fatigue. There are many sip-and-puff controls on the market for various things, but they can be expensive or difficult to customize. What I’m showing here is an extremely affordable, simple to build, and fully customizable sip-and-puff setup used to control two different remote control toys that have very different controls.
Detecting the sips and puffs is done with a pressure sensor. For this project I chose the MPXV7007G: http://cache.freescale.com/files/sensors/doc/data_sheet/MPXV7007.pdf
This sensor takes -1 to 1 psi as input and maps it to 0.5 to 4.5V as output if you power it at 5V. This nicely sets the full scale as a strong sip to a strong puff and still allows specifically detecting soft sips and puffs. To make it easier to prototype with I soldered on a 4 pin male header and then added hot glue for mechanical support as pictured below.
We are angry, frustrated, and in pain because of the violence and murder of Black people by the police because of racism. We are in the fight AGAINST RACISM. George Floyd was murdered, his life stolen. The Adafruit teams have specific actions we’ve done, are doing, and will do together as a company and culture. We are asking the Adafruit community to get involved and share what you are doing. The Adafruit teams will not settle for a hash tag, a Tweet, or an icon change. We will work on real change, and that requires real action and real work together. That is what we will do each day, each month, each year – we will hold ourselves accountable and publish our collective efforts, partnerships, activism, donations, openly and publicly. Our blog and social media platforms will be utilized in actionable ways. Join us and the anti-racist efforts working to end police brutality, reform the criminal justice system, and dismantle the many other forms of systemic racism at work in this country, read more @ adafruit.com/blacklivesmatter
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.