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The white LEDs are used for providing proper lighting for the sensor to detect the object colour correctly
It basically allows shifting levels between a TTL signal (0 - 5 V) and a RS232 signal (15 V - -15 V)
Thermistor Mounting : Through Hole
These stickers can be read from and written to using the RC522 RFID Reader and a microcontroller like an Arduino
Infrared Receiver (VS1838B) includes high-speed high-sensitivity PIN photodiode and a low-power
L7812CV +Ve Voltage Regulator (12V -1A) Arduino Mega 2560 R3 The white LEDs are usedIntroduction : L7812CV +Ve Voltage Regulator (12V 1A) is a three terminal linear voltage regulator IC with a fixed output voltage of 12V which is useful in a wide range of applications. Features : Output Voltage : 12V. Input Voltage : Up to 35V. Output Current : 1. 5A . No. of Pins : 3 pins