KY-008 laser sensor module:

Operating voltage: 5V
Specifications: 15 * 24 mm
Light source wavelength: 650 nm
Weight: 2.2 g

Obstacle avoidance sensor module:

VCC: 3.3V-5V external voltage (can be directly connected to the 5v and 3.3v microcontroller MCU)
GND: External GND
OUT: Small board digital output interface (0 and 1)
Connection method: VCC-VCC; GND-GND; OUT-IO
Board size: 3.2 x 1.4cm

Flame sensor module:

Operating voltage: 3.3V-5V
Output form: DO digital switching output (0 and 1) and AO analog voltage output
Size: 3.2cm x 1.4cm
Detect flame or wavelength range (approx): 760 nm to 1100 nm, lighter flame test distance is 80cm, the greater flame, the farther test distance
Detection angle is about 60 degree, particularly sensitive to flame photometry
Adjustable sensitivity

315M wireless transceiver module:

Operating voltage: DC5V
Quiescent current: 4Ma
Receiving frequency: 315MHz
Receiving sensitivity: -105DB
Size: 30 x 14 x 7mm

Emission head parameters:
Transmission distance: 20-200 meter (different voltage, different effect)
Operating voltage: 3.5-12V
Dimension: 19 x 19mm
Work: AM
Transfer rate: 4KB / S
Transmitting power: 10mW
Transmission frequency: 315M
Pinout left → right: (DATA, VCC, GND)

One channel TCRT5000 tracing module:

Detection distance: about 10mm
Operating voltage: 5V, black line output low level, white line output high level

Shock sensor module:

Operating voltage: 3.3V-5V
Output type: Digital switching output (0 and 1)
Small PCB board size: 3.2cm x 1.4cm

MQ-2 gas sensor module:

Dimension: 32 x 22 x 27mm (L x W x H)
The main chip: LM393, ZYMQ-2 gas sensor
Operating voltage: 5V DC
Dual signal output (analog output, and TTL level output)
TTL output valid signal is low level. (When the output low level signal light can be directly connected microcontroller)
Analog output: 0 ~ 5V voltage, the higher the concentration the higher the voltage.

Sound sensor module:

Operating voltage: 3.3V-5V
Small PCB board size: 3.4cm x 1.6cm

DHT11 temperature and humidity sensor module:

VDD: 3.3-5.5V DC
DATA: Serial data
NC: No connection
GND: Grounding, negative power supply

HC-SR04 ultrasonic sensor module:

Operating voltage: 5V
Ultra-small quiescent current: less than 2mA
Induction angle: not more than 15 degrees
Detection distance: 2cm-400cm
High precision: up to 0.3cm