UNO WIFI Board CH340 compatible Arduino, NodeMCU, WeMos ESP8266

M18 Inductive Proximity Sensor features:
- Inductive proximity sensor detection switch LJ18A3-8-Z / BX
- NPN DC6-36V
- A Often used for 3D printer bed leveling
- Cylindrical cable type DC 3 cable type (black, brown, blue)
- Inductive sensor type
- NPN NO (Normal Open )
- Detecting distance 8mm
- DC supply voltage 6-36V
- Current output 300mA
- Response frequency 0.5KHz
- Detects iron / aluminum - Operating temperature -25 ° C to + 70 ° C (Non-freezing condition)
- Head diameter 18 mm
- Size 6.9 x 2cm
- Cable length 90cm

RTC DS3231 clock module with EEPROM 32k.
High precision RTC module.
Can be used in projects of Arduino, PIC, AVR, STM32 and other.
DSC321 AT24C32 with Real Time Clock RTC Battery features:
- Based on DS3231
- EEPROM AT24C32 (32K)
- I2C interface
- LED work indicator
- Includes CR2032 3V battery

The optical module (reflective) sensor with CMOS Schmitt inverter 74HC14D, which detects obstacles with high precision. The ideal obstacle detection detector for the installation of smart robots. TCRT5000 - reflective optical sensor that has a compact construction where the light emitter and receiver are placed in the same direction to detect the presence of an object using infrared reflection on the object. The working wavelength is 950nm. The transmitter is infrared LED and the phototransistor receiver.
The sensor allows the detection of an object at a distance of up to 15 mm. TCRT5000 IR Infrared Sensor Module features:
- The module has an output: digital
- CMOS Schmitt inverter 74HC14D
- Power supply: 5V - Range: 0.2 mm - 15 mm

Latching Metal Switch 16mm Stainless Steel features:
- For panel N/A NO 2A 36V Stainless Steel On/Off
- Type of operation: On/Off
- Contact switch: 1 NA (normally open)
- Max Switch Classification: 2A/36VDC
- Type of terminal: Screw
- Body material: Stainless steel
- Button Material: Stainless steel
- Protection Classification: IP67 / IK08
- Operating temperature: -20C + 55C

- Immerse the probe in the fish tank to measure the water temperature Digital Thermometer with External Temperature Probe features:
- Cable length: 1m
- LCD screen
- Temperature range: -50 C ~ + 70C
- Powered by 2 batteries x LR44 / AG13 button (included)
- Cable length: approx.100cm
- External Dimensions: 48 x 28.5 x 15.2 mm
- Dimension LCD screen: 35 x 16 mm
- Color: Black
- Used to measure the temperature in: the rooms, the aquarium, terrarium in the heating system, in the car, fridge, freezer

Platform camera + 2 SG90 Servo Motor 9g Arduino Kit features:
- Operating voltage: 3.0-7.2V
- Speed (4.8V without load): 0.12sec / 60 degrees
- Force: 1.2kg / 42.3oz (4.8V), 1.6kg / 56.4oz (6.0V)
- Working temperature: -30 to +60 Degree C
- Cable length: approx. 23cm
- Includes photo accessories and screws
- Dimensions: 22x11.5x27mm Contents: - Servo 9g - 2 units
- Platform for camera - 1 unit

Descent module.
Use a multimeter to check the output voltage and adjust the potentiometer.
Control of tension.
LM2596 DC Voltmeter Converter 3A Step Down Adjustable Power features:
- Input voltage: 4.5-38V
- Output voltage: 1.25-36.5V
- Current output: 2A (max 3A with heat sink)
- Operating temperature: -40 to + 85 ºC
- Operating frequency: 150KHz
- Efficiency conversion: up to 92%
- Load Regulation: +/- 0.5%
- Voltage Regulation: +/- 2.5%
- Protection over temperature: the output switches off automatically
- Size: 62mm x 38mm x 15mm
Principal functions:
- Step-down converter with overcurrent protection
- Voltmeter up to 40V, remember to set the input voltage to 4.5V

Jack connectors 2.1mm inside and 5.5mm outside to power devices such as LED strips, CCTV (Cameras), Arduino. Connector Jack 2.1x5.5mm Power Supply DC Male features:
- Ideal for connecting without welding
- It has two screws in the tip for positive and negative cable screwdriver