Blackboard NFC/Mag reader

grabcad

The design of Blackboard Transact is founded on two primary objectives: ergonomics and affordances with semantics. Designed for use in crowded spaces, it is quick and simple, accommodating different user heights and wheelchair users through its tilt mechanism. Its usability is preserved in various orientations—handheld, wall-mounted, or flat. Ergonomically, the device is straightforward and uncomplicated with a focus on functionality. Affordances and semantics are crucial to Blackboard Transact's design. It is aesthetically pleasing, conveying its purpose through its appearance, ensuring smooth transactions. The design adheres to the brief description of being "a modern, ergonomic design with a high-tech look, marketable, and cool." Discreet yet identifiable, it features subtle design elements such as a chamfered mag stripe entry slot, positioning of labels, and LED feedback. The device's size has been minimized to cut down on material costs while maximizing portability. It can be used as a handheld device, swiped comfortably without obstructions, and is accessible to various devices of different shapes and sizes. The stand uses a snap-fit mechanism that can be removed if needed. A USB port at the rear allows charging in various orientations. LEDs provide clear feedback, with tri-color power indicators (green for +60%, amber for 30-60%, red for <30%), Bluetooth lights pulsing during connection and illuminating when paired, and dual-color permit/deny LEDs using red and green to signal feedback. The PCB remains the same size as the provided file, with components attached to the board fitting into injection-molded ribs for security. The housing has a wall thickness of 1.5mm, uses black plastic, and has a removable battery via screws. STL files are available for 3D printing, but some parts are excluded as they are unnecessary for prototyping purposes. Designing Blackboard Transact has been an enjoyable learning experience, and the opportunity to participate is greatly appreciated.