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Connect the relay board to USB for control
Length: 77
temperature sensing Temperature Sensor DS18B20 Module for Arduino temperature sensor with digital output analog output
Helps solder flow better on pads and component leads
A small piezo element may only generate microwatts — enough for a low-power MCU waking briefly
Speaker 1.5" Diameter 4 Ohm 3W - Adafruit 1314 Compact vga sensor Connect the relay board to1. 5" Speaker 4 3W The 1. 5" Diameter Speaker (4, 3W) pairs perfectly with small Class D amplifiers like the PAM8403 or MAX98306. It's loud enough for a portable Bluetooth speaker build, desktop notification system, or interactive exhibit. Technical specifications Diameter 1. 5" (~40mm) Power 3W Impedance 4
