Set with transmitter and IR receiver. It can be used, for example, as a beam break sensor

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 9 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors.

Module with 9 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4409

Universal loudspeaker with a power of 3 W and a resistance of 4 Ω. It has a diameter of 40 mm

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 6 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors.

Pololu 2834

Pololu 2832

Liquid level sensor (maximum measuring depth 40 mm) with analog output. The output voltage varies in proportion to the liquid level.

Module with 8-bit ADC and 8-bit DAC. It allows you to measure voltage and generate an analog signal. Communicates via I2C

Dual Full-Bridge Driver, Power SO20, STM, RoHS

Simple and versatile module that converts I2S audio signals into analog signals, making it ideal for driving speakers with up to 3.2W of power.

The module allows measuring the light around the sensor. The measuring range is in the range 1 - 65535 LUX, and communication takes place using the I2C bus. modBH1750 (GY-302)

modTSL2561 is a module containing a light sensor TSL2561; communication with the system takes place using the I2C bus

Module with 5 QTR type optocoupler with RC (digital) output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4145

A female-female cable, 50 mm long, terminated on both sides with a JST-ZH 2-pin plug. Suitable for micro DC motor modules. Pimoroni CAB1012

GY-346 is a module with a digital acceleration sensor (accelerometer) ADXL346; communication on the I2C / SPI bus

Module with 2 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4442

8 MPx camera module with IMX219 sensor and wide-angle lens. To be used as a replacement on the RPI Camera Board V2. Waveshare IMX219-D160

An e-Paper display module with a diagonal of 2.13" and a resolution of 250x122 px. It communicates via an SPI interface. Waveshare 2.13inch E-Paper HAT (G)