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 ...

As found in the schematic of the generic PIR motion detector module, one pin of the LDR goes to ground rail (0 V) and the other pin goes to Pin 9 of the PIR controller IC (BISS0009). The same pin goes ...