1 Nos Buzzer Module for Arduino

XL4015 5A DC-DC Step-Down Buck Converter is a high-efficiency adjustable power module supporting 4V–38V input, 1.25V–36V output, up to 5A current, and 75W power. With up to 96% efficiency, 180kHz switching, thermal, current-limit, and short-circuit protection, it is ideal for DIY power supplies, battery charging, robotics, Arduino, ESP32, and vehicle electronics.

PAM8403 5V 3W+3W Stereo Audio Amplifier Module is a compact and efficient Class-D amplifier featuring dual-channel 3W+3W output, 2.5V–5.5V operation, up to 87% efficiency, low noise, and built-in short-circuit and thermal protection. It is ideal for Arduino, ESP32, Raspberry Pi, Bluetooth speakers, robotics, gaming, and portable audio projects.

The 12V 8-Channel Relay Module is a reliable multi-channel switching board designed to control multiple AC or DC loads using Arduino, Raspberry Pi, and other microcontrollers. It features 8 optocoupler-isolated relays, active-low triggering, indicator LEDs, and NO/COM/NC outputs for flexible switching. Each relay supports up to 250V AC/10A or 30V DC/10A, making it suitable for home automation, robotics, industrial control, pumps, motors, lights, and DIY electronics projects.