This is a low cost Ultrasonic Distance Sensor provides a non-contact distance measurement with a fine accuracy of 3mm. The module is capable of measuring distance from obstacles in range of 2 cm to 400 cm or 1 inch to 3 Ft. Unlike IR sensors, the performance of this sensor is no dependent on the sunlight or color of the object.

Specification:
   • Power Supply :+5V DC
   • Working Current: 15mA
   • Effectual Angle: < 15 degree
   • Ranging Distance : 2cm - 400 cm/1 inch - 13ft
   • Resolution : 0.3 cm
   • Measuring Angle: 30 degree
   • Trigger Input Pulse width: 10uS.

MQ-2 gas sensor has high sensitive to LPG, Propane and Hydrogen, also could be used to Methane and other combustible steam, it is with low cost and suitable for different application..

This LPG Gas Sensor (MQ6), ideal sensor for use to detect the presence of a dangerous LPG leak in your Home, car or in a service station, storage tank environment. The sensor can also sense iso-butane, propane, LNG and cigarette smoke..

SM0038 - TSOP1738 IR Receiver Modules For Remote Control Systems.

The AD592 is a two terminal monolithic integrated circuit temperature transducer that provides an output current proportional to absolute temperature..

MQ-5 gas sensor has high sensitivity to LPG, natural gas, methane, propane, butane and small sensitivity to alcohol, smoke..

The PIR Sensor module allows you to sense motion. It is almost always used to detect the motion of a human body within the sensor's range. The PIR sensor module provides an output "HIGH" when a human body is detected within its range and an automatic Delay "LOW" when the body leaves its range. The delay time is adjustable using the potentiometer on-board. The minimum delay time that can be set is 5 seconds and maximum of 200 seconds. The blocking time potentiometer is also provided on-board to set the blocking time during which the sensor does not respond to any change in motion. The minimum blocking time that can be set is 2.5 seconds and maximum of 10 seconds.
Specifications:
   • Infrared sensor with control circuit board
   • The sensitivity and holding time can be adjusted
   • Detecting Range: Approx. 7m / 23 feet
   • Detecting Angle: Less than 100 degrees
   • Working Voltage Range: DC 5V- 20V
   • Quiescent Current: Less than 50uA
   • Level Output Voltage: High 3V / Low 0V .

MQ-2 gas sensor module has high sensitive to LPG, Propane and Hydrogen, also could be used to Methane and other combustible steam, it is with low cost and suitable for different application.
Working voltage: DC 5V, DOUT: TTL output, AOUT: Analog output, Preheat time: Over 20s..

MQ-3 Gas Sensor module, sensitive to Alcohol, Ethanol concentrations. Output is proportional to concetration of Alcohol / Ethanol.
Working voltage: DC 5V, DOUT: TTL output, AOUT: Analog output, Preheat time: Over 20s..

IR Infrared Receiver Diode 3mm LED.

IR Infrared Emitting Diode 3mm - Clear Lens.

MQ-4 gas sensor has high sensitivity to methane(CH₄) and natural gas and small sensitivity to alcohol, smoke..

TV Remote Controllers Infrared Emitting Diode, 940 nm, IR Emitter - 5mm Blue LED.

IR Infrared Emitting Diode 5mm - Clear Lens.

IR Infrared Receiver Diode 5mm LED.