10x Male-Male Cables 20cm Jumpers Dupont 2,54

The piezoelectric buzzer has a simple structure in which a ceramic piezoelectric disk is affixed to a vibrating plate. An alternative voltage applied to this element will cause a contraction or diametrical expansion of the element. This feature is used to fold a vibrating plate, which generates sounds. 2x Passive Buzzer 5V features:

- Input voltage: 3V to 12V
- Diameter: 12mm
- Height: 7.5mm
- Pin spacing: 6.5mm
- Impedance: 16 Ohm
- Working frequency: 2 to 5 KHz
- Quantity: 1 unit

25x M3x8 Nylon Screw features:
-Polyamide 8mm Thread Arduino Robot PCB Screw
-M3 Screw
-Thread: 8mm
-Round head
-Star (Philips) DIN7985
-Quantity: 25 units
-Color: white

NodeMcu module based on ESP8266 controller and programming in Lua language.
NodeMcu is equipped with 10 GPIO, PWM, I2C, 1-wire and ADC.
ESP8266-12E is an improved version of ESP8266-12.
It works as a standard WiFi 802.11 b / g / n 2.4 GHz.
USB communication - the CH340 chip. Characteristics of ESP 12E:
- Supply voltage: 3.3V (LOGICAL LEVELS: 3.3V)
- Supported protocols: 802.11 b / g / n
- Network support: 2.4 GHz
- Band: 2400 (MHz)
- Wi-Fi Direct (P2p), Soft Access Point
- TCP Stack / Integrated IP
- PLLs, Regulators and Integrated Power Management Units
- Output Power: 0.15 (W); + 19.5dBm in 802.11b mode

Characteristic: - Operating voltage: 3-6V
- Max flow: 80-120 l / h
- Maximum pumping height: 40-110cm
- Continuous working time of 500 hours
- Cable length: 20cm
- Inside outlet diameter: 5 mm
- Outside outlet diameter: 7.5 mm - Dimensions: 45mm x 23mm x 30mm

This module can handle 16 PWM signals, through an I2C connection with devices like microcontrollers or development boards like Arduinos.
It can also be concatenated with other equal modules (up to 62 cards), increasing versatility and allowing you to obtain up to 992 PWM outputs that can be used to connect servo motors or LEDs to change the brightness intensity.
PCA9685 digital servo motor controller 16 channel PWM features:

- Supply voltage: 3-5 VDC,
- Maximum motor voltage: 6 VDC,
- Number of channels: 16,
- Resolution per channel: 12 bits,
- Interface: I2C,
- Working frequencies: 40-1000 Hz,
- PCB size: 62.3x25.3mm .

The optical (reflective) module sensor with LM393 comparator, which detects obstacles with high accuracy. The ideal detector for obstacle detection for the installation of intelligent 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 transmitter is an infrared LED and the receiver is a phototransistor. The sensor allows the detection of an object at a distance of up to 3.5 cm from the white paper and 1 cm from the person's finger.

Free metal wheel with white plastic support.
It allows a 360 ° rotation, wheel silently and without problems. Free metal wheel 360° with plastic support for robotics features:
- Main material: Polypropylene (PP), Steel.
- Main color: White, silver tone. - Dimensions of support: 50x24mm. - Ball diameter: 15.80mm.  

USB Cable A to Micro USB B Arduino Leonardo, Due features:
- Color: Blue or black
- Length: 50cm