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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.”

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