Real-time access control using RFID tags. Visual feedback with LEDs: Default LED stays ON to indicate system readiness. Green LED lights up for access granted. Red LED lights up for access denied.

Real-time access control using RFID tags. Visual feedback with LEDs: Default LED stays ON to indicate system readiness. Green LED lights up for access granted. Red LED lights up for access denied.

Like almost all Arduinos, has a built-in led – the green one on the left in the photo. And it has a pair of yellow leds – called TX and RX – to indicate traffic on the serial bus. Except, on the Micro ...

Posted in Arduino Hacks Tagged arduino, buzzer, game, led, office ← Coffee Table Puts On A Show Behind Smoked Glass Weekly Roundup 2/4/12 → ...

Arduino has launched its next generation of UNO boards, introducing a 32-bit Renesas microcontroller and Espressif ESP32-S3 module, one-click cloud connectivity and plenty of I/O plus a 12×8 red LED ...