78R33 (3.3 V Voltage Regulator) Counter 74HC32 is a quad 2-input

74HC32 is a quad 2-input OR gate

HMC5883L 3-axis Magnetometer

The IR detector have a demodulator inside that looks for modulated IR at 38 KHz

skin examination

Multi-direction vibration detection

78R33 (3.3 V Voltage Regulator) Counter 74HC32 is a quad 2-inputIntroduction : 78R33 +Ve Voltage Regulator (3. 3V 1A) is a three terminal linear voltage regulator IC with a fixed output voltage of 3. 3V which is useful in a wide range of applications. Features : Voltage regulator : 1 A 3. 3V . Output : low dropout. TO220 Full Mold package (4PIN). Overcurrent protection, Thermal shutdown. Overvoltage protection, Short Circuit protection. No. of Pins : 4 pins.