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QMK (Quantum Mechanical Keyboard [2]) is open-source firmware for microcontrollers that control computer keyboards. [3] [4] [5] The QMK Configurator is freely available software which facilitates designing keyboard layouts and then turning them into firmware files. The QMK Toolkit is freely available software which facilitates the flashing or ...
A modern PC keyboard typically includes a control processor and indicator lights to provide feedback to the user about what state the keyboard is in. Depending on the sophistication of the controller's programming, the keyboard may also offer other special features. The processor is usually a single chip 8048 microcontroller variant. The ...
A ferrite bead – also called a ferrite block, ferrite core, ferrite ring, EMI filter, or ferrite choke [1] [2] – is a type of choke that suppresses high-frequency electronic noise in electronic circuits. Ferrite beads employ high-frequency current dissipation in a ferrite ceramic to build high-frequency noise suppression devices.
Passive noise control is sound reduction by noise-isolating materials such as insulation, sound-absorbing tiles, or a muffler rather than a power source. Active noise canceling is best suited for low frequencies. For higher frequencies, the spacing requirements for free space and zone of silence techniques become prohibitive.
Mechanical keyboards (or mechanical-switch keyboards) are computer keyboards which have an individual switch for each key. The following table is a compilation list of mechanical keyboard models, brands, and series:
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Zeal PC Gateron Clickiez MX Type Stem Clicky/Tactile/Linear Click Leaf 40/75 g 32/58 g 73/95 g 2.0 mm (unchecked) 4.0 mm Plate Mounting No Yes N/A Zeal PC Gateron Crystal MX Type Stem Tactile N/A ~50g ~70g 60 g 2.0 mm 4.0 mm Plate Mounting No Yes N/A Zeal PC Gateron Zealio V1 Redux MX Type Stem Tactile N/A ? ? 62g/67g 2.0 mm 4.0 mm
An electronic keyboard, portable keyboard, or digital keyboard is an electronic musical instrument based on keyboard instruments. [1] Electronic keyboards include synthesizers , digital pianos , stage pianos , electronic organs and digital audio workstations .