Battery holder 1x 18650 PCB mount

Resistor 220K Ohm 5% 0,25W 1/4W features:
-220 Ohm
-Type: Carbon film
-Tolerance: ±5%
-Power: 0.25W
-Dimensions: 2x7mm

Mini ESP8266 ESP12E CH340 WiFi Development
NodeMcu module based on ESP8266 controller and programming in Lua language
NodeMcu it is equipped with 10 GPIO, PWM, I2C, 1-wire and ADC
It works as a standard WiFi 802.11 b / g / n 2.4 GHz
Wemos D1 Mini ESP8266 ESP12E CH340 WiFi Wireless Development features:

- Compatible with Arduino, programming with the Arduino IDE
- Power supply voltage: 5V
- LOGICAL LEVELS: 3.3V
- 11 input / output pins
- 1 ADC (input: 0-3.3V)
- Supported protocols: 802.11 b / g / n
- Network support: 2.4 GHz - Band: 2400 (MHz)
- Wi-Fi Direct (P2p), Soft Access Point
- Integrated TCP / IP stack
- PLL, regulators and power management units Integrated

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

40x Female-Female Cable 10cm features:
- Length: 10cm
- Quantity: 40 cables
- Dupont female connectors on both ends
- Compatible with 2.54mm male connectors
- High quality and good working conditions
- Easy to install and use

NFC module for Educational STEAM Kit.  Near field communication (NFC) is a set of standards for smartphones and similar devices to establish radio communication with each other by touching them together or bringing them into close proximity, usually no more than a few centimeters. Compatible with almost any microcontroller, Arduino, PIC, AVR. It can be used in Access Control projects and Alarm projects. RFID PN532 NFC Module with Card and Pendant features:
- Support i2C, SPI, High Speed UART - Support RFID reading and writing - Support P2P communication with peers - Support NFC with phone - Work in NFC Mode or RFID reader/writer Mode - RFID reader/writer supports: - 1k, 4k, Ultralight, and DesFire cards ISO/>

40x Female Male 10cm features:
- Length: 10cm
- Quantity: 40 cables
- Compatible with 2.54mm male connectors
- High quality and good working conditions
- Easy to install and use

Cable chain 10x20 1m CNC 3D printer features:
-Suitable for movements where cable displacement or twisting is needed, where cable protection is needed. - Easy for instalation and maintenance; Low noise, high speed wear resistant movement. - The cable structure has been widely used in CNC machine tools, electronic equipment, fire fighting machinery and equipment, stone machinery, glass machinery, machine doors and windows, injection molding machines, robots, overweight transport equipment, automated warehouses. - Interior widths 10x20mm
- Exterior measurement 15x28mm
- Material: reinforced series polyamide
- Length 1m
- Quantity: 1 unit