The S9V11MACMA switching step-up/step-down regulator efficiently produces a finely adjustable output between 2.5 V and 9 V whether it is higher or lower than the input voltage, which can range from 3 V to 16 V. The regulator also has a precision-adjustable low-voltage cutoff with hysteresis that can be used to prevent battery over-discharge.

The S9V11F5S6CMA switching step-up/step-down regulator efficiently produces a fixed 5 V (default) or 6 V (selectable) output whether it is higher or lower than the input voltage, which can range from 2 V to 16 V. (Note: minimum start-up voltage is 3 V, but it operates to 2 V after that.)

Bipolar stepper motor driver operating at voltages from 8 to 50 V and currents up to 8 A/phase (11 A with cooling). The DRV8711 driver with an SPI interface offers 9 stepping modes (up to 1/256), current configuration, stall detection, and protection against short circuits, overloads, and reverse polarity. Compatible with 1.8–5 V logic, it is ideal for CNC machines, 3D printers, and robotics. Pololu 3731

Tiny programmable module featuring Microchip’s PIC18F25K50 microcontroller. It packs a Micro-USB interface and 16 digital input/output pins onto a 1″×0.6″ board and ships preloaded with a USB bootloader, so no external programmer is required. Pololu 3150

The compact (0.4″ × 0.5″) D24V5F15 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 15 V while allowing for a maximum output current of 500 mA. Pololu 2847

Module with 7 QTRX 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 4307

Pololu Low-Voltage Dual Serial Motor Controller

These 17 mm long aluminum adapters convert a 3 mm diameter shaft to a 12 mm hex shaft that compatible with many common hobby RC wheels. The set includes two adapters, two M4 screws for securing wheels to the adapters, four M3 set screws for securing the adapters to motor shafts, and one 1.5 mm Allen wrench for use with the set screws.

Standard digital servo equipped with a metal gear. It is characterized by high torque and increased supply voltage (from 6 to 7.4 V). Pololu 3427

Standard digital servo equipped with a metal gear. It is characterized by high torque and high durability. Pololu 3428

The GP2Y0A60SZ distance sensor from Sharp offers a wide detection range of 4″ to 60″ (10 cm to 150 cm) and a high update rate of 60 Hz. The distance is indicated by an analog voltage, so only a single analog input is required to interface with the module.

Tamiya 70157 Universal Plate Set (2pcs.)

FEETECH Sub-Micro Servo FS0403

DC motor driver that allows you to control the movement of two drives using the I2C interface. Board with soldered connectors. Pololu 5054

Motor with 25 mm diameter and 52 mm length, 74:1 metal gear, 6 V operating voltage, 0,25 A to 2,4 A power consumption, 120 RPM speed and 4,7 maximum torque. Pololu 1585

DC motor driver that allows you to control the movement of two drives using the I2C interface. Board with soldered connectors. Pololu 5039

DC motor driver that allows you to control the movement of two drives using the I2C interface. Board with soldered connectors. Pololu 5040

This controller allows independent control of three DC motors using a single I²C bus. It supports motor supply voltages ranging from 4.5 to 44 V and currents up to 0.8 A continuous per channel, making it suitable for a wide range of robotic and mobile applications. I²C communication eliminates the need to generate PWM signals and significantly saves microcontroller pins. The ability to connect multiple controllers on a single bus allows for easy scaling of the system to larger motor counts. Pololu 5083

Module with a stepper motor driver based on the DRV8434A system. It allows the bipolar motor to be supplied with current up to 1.2 A per phase and with a voltage from 4.5 V to 45 V. Communication via the SPI interface. Pololu 3768

A set of two 70x8mm white Pololu wheels. Fits D-shaped shaft with a diameter of 3mm. Pololu 1429