Each LED anode (long leg) is connected to Arduino digital pins D2 through D10. Each LED cathode (short leg) is connected to GND through a 220Ω resistor.

VFDs — vacuum fluorescent displays — have a distinctive look, and [Anthony Francis-Jones] is generally fascinated with retro displays. So, it makes sense that he’d build a VFD project as an ...

founder and chairman of Shenzhen Xinmao New Energy Technology Co., Ltd., shared insights on the topic of "Progress in Cathode and Anode Material Repair and Restoration." **Purpose and Significance of ...

A minimal end-to-end optical data‑link demonstration using an Arduino’s red LED as transmitter and a light-dependent resistor (LDR) on analog pin A5 as receiver. Text messages sent over serial are ...

Department of Fluid Dynamics and Thermodynamics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Prague 166 07, Czech Republic ...