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There is an onboard micro-SD card slot
Single-Supply Operation : 2
78R33 +Ve Voltage Regulator (3
It also measures the overall intensity of the reflected light using a clear filter over three of the sensors
SparkFun 16 Output I/O Expander Breakout - SX1509 K-Thermocouple There is an onboard micro-SDIntroduction : SparkFun 16 Output I O Expander Breakout SX1509 is a 16 channel GPIO expander with an I2C interface that means with just two wires, your microcontroller can interface with 16 fully configurable digital input output pins. SparkFun 16 Output I O Expander Breakout SX1509 can do so much more than just simple digital pin control. It can produce PWM signals, so you can dim LEDs. SparkFun 16 Output I O Expander Breakout SX1509 can also act as