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.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Alibaba to invest $15b in tech, set up research labs around the world
Wearables — Hand beading mimicry
Electronics — Trigger happy oscilloscope?
Biohacking — Biohacking: Visioneer – AI Glasses to Assist the Visually Impaired
No comments yet.
Sorry, the comment form is closed at this time.