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Magnetic door alarm system
The LM35 series are precision integrated-circuit temperature sensors
The ethernet shield connects to an Arduino board using long wire-wrap headers which extend through the shield
SparkFun 16 Output I/O Expander Breakout - SX1509 can also act as a level shifter to connect a microcontroller running at one voltage level to a component running at a different voltage level
you can adjust the digital output sensitivety by the on-board potentiometer
IMU 9DOF Sensor ( ITG3205 + ADXL345 + HMC5883L) Hall Magnetic door alarm systemIntroduction: 9 axis module (three axis gyro + three axis acceleration + three axial magnetic) containing some of the most popular chips. What also sets this board apart from others is the integrated 3. 3V Voltage Regulator and Logic Level Conversion. You can connect this board directly to 5V systems (5V power in to VCC) and the SDA and SCL pins will be at 5V levels, but you can also connect it directly to 3. 3V systems (3. 3V power in to VCC) and the
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