Sub Miniature Adaptive/Assistive Nurse Call Switch
Description
An adaptive/assistive switch designed with hospitalized people with muscular dystrophy or spinal muscular atrophy -- any challenge that limits peripheral movement to very slight and weak movements of the upper or lower digits. It allows one to activate a hospital call light via the standard 1/4" mono jack (via an adapter), particularly when traditional specialty silicone call switches are too difficult to press and other commercial [head] switches are too difficult to reliably position. I chose to make an on-board mono jack because I wanted to ensure a damaged hardwire to a male mono jack wouldn't render the device useless. This imparts greater longevity/durability, and allows the freedom to use a right-angle adapter at the device. This particular design was created and refined with AutoDesk TinkerCad. It's an excellent and free way to get started with 3D creations and STL exports, but the UI/UX is rather limiting/restrictive once you're an intermediate or advanced user. The switch is intended to be a "Sub Miniature E-Switch, Basic / Snap Action Switch". Manufacturer P/N: TS0101F020P (alternative part: TS0101F020V4 but requires right angle pins to be carefully bent and trimmed) A DPDT slide switch opposite the snap action switch allows selection of normally-closed or normally-open operation. I recommend trying P/N: SSSS820201 ("DPDT VERT GRD 1.5mm Alps Alpine Slide Switch") It's much smaller than the random surplus switch pictured here, and I plan to use this micro SMD switch going forward. The wires I use are very thin insulated wires I found at a local surplus store, and I an inexpensive soldering iron with a pencil/fine solder tip. Assembly wiring, switches, and jack is secured and made water resistant with ClearWeld epoxy. The hook-and-loop finger securement is simply trimmed off-the-shelf cable/cord bundler.
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