The voltages and signal timings described below are dependent on the battery voltage and are probably also impacted by temperature. While the calculator runs on a 9 V battery, internally the logic ...

A keyboard matrix circuit is a design used in most electronic musical keyboards and computer keyboards in which the key switches are connected by a grid of wires, similar to a diode matrix. This kind ...

Abstract: Herein, we present the design, technical implementation, and evaluation of a low-cost ultraviolet (UV) exposure setup, that is based on 3D-printed components, Arduino microcontroller, and ...