These temperature sensors work great with any microcontroller using any single digital pin. We can also connect multiple ones to the same pin. Each one has a unique 64 bits ID burn. It is useable with 3 to 5 volts systems. There is one downside of this sensor is they use the Dallas 1-wire protocol, and which is somewhat complex. This protocol requires a bunch of code to parse out the communication. When you are using this temperature sensor with a microcontroller put a 4.7K resistor to the sensing pin.

The Obstacle Detector sensor module is perfectly adaptable to the environment light, IR Object Avoidance Sensor has a pair of infrared transmitting and receiving tubes; transmitting tube emits infrared in a certain frequency, when detecting direction meets with obstacles(reflecting surface), reflected infrared will be received by the receiving tube; after the comparator circuit processing, the green indicator will light up, at the same time signal output interface to output digital signal(1 low-level signal). Users can adjust the detection distance through the potentiometer knob, effective distance range 2~30cm and working voltage is 3.3V to 5V. The Obstacle Avoidance module LM393 can be widely used in robot obstacle avoidance, obstacle avoidance car, line count, black and white line tracking, and so on many occasions.