![]() Lithium Ion Polymer Battery - 3.7v 500mAh (approximately $7.95).Lithium Ion Polymer Battery - 3.7v 150mAh (approximately $5.95).Feather stacking headers 12-pin and 16-pin female headers (approximately $1.25).Feather Header Kit-12pin and 16-pin Header set (approximately $0.95).Adafruit feather NRF52 Bluefruit LE (approximately $24.95).The lock works, the wall thickness reduced to half, still very sturdy more reduction possible Lock Mechanism two part print in which the top half moves into the ‘lips’ in the bottom and locks in place The walls are very sturdy, still a lot of scope of reducing weight, one of the supports broke (too thin) Reduced thickness to remove weight, removed lock pins, added support for springs ![]() The lock pin is too small to be printed using 3D printing Printed as four parts a base and a top, with a pin that locks through a hole big enough to allow for button actuation Not very effective, inconvenient to use, needs to be screwed in at a particular angle, not enough movement We went through several iterations to get to this level, and we expect many more as we open source this project.Ī base and a top with a spiral/threaded neck with a large pitch to allow for switching We want to make sure everyone is able to use a buddy button, and that it's suited to their needs.Īn open source project, to design a low cost specialized button for people with limited mobility as a replacement for commercially available options that can cost between $60-500.
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