Prototype contact plate 400 points, dimensions 82 x 53 mm. In the middle of the plate there are mounting holes, which allows its use in connection with the Romi Chassis chassis. Pololu 4000

Compact ISP programmer for AVR microcontrollers. Works with Atmel Studio, AVRDUDE and Arduino IDE environments, using the STK500 protocol. Has a USB-TTL adapter function. Pololu 3172

A5984 stepper motor driver for bipolar stepper motors, supply voltage 8–40 V, fixed current limit of 750 mA at 5 V or 500 mA at 3.3 V, microstepping up to 1/32, and STEP/DIR interface. Pololu 5348

A5984 stepper motor driver for bipolar stepper motors, supply voltage 8–40 V, fixed current limit of 750 mA at 5 V or 500 mA at 3.3 V, microstepping up to 1/32, and STEP/DIR interface. Version with soldered header pins. Pololu 5349

A5984 stepper motor driver for bipolar stepper motors, supply voltage 8-40 V, fixed current limit 500 mA at 5 V or 330 mA at 3.3 V, microstepping up to 1/32 and STEP/DIR interface. Pololu 5350

A5984 stepper motor driver for bipolar stepper motors, supply voltage 8-40 V, fixed current limit 500 mA at 5 V or 330 mA at 3.3 V, microstepping up to 1/32 and STEP/DIR interface. Version with soldered header pins. Pololu 5351

2-channel digital isolator based on the Texas Instruments ISO6521, enabling galvanically isolated digital signal transmission at data rates up to 50 Mbps. The module provides one communication channel in each direction (1/1), offers functional isolation up to 450 VRMS, independent power supplies for both sides of the circuit, and can also operate as a logic level translator. Pololu 5748

2-channel digital isolator based on the Texas Instruments ISO6520, enabling galvanically isolated digital signal transmission at speeds of up to 50 Mbps. The module features two forward channels (2/0), provides functional isolation up to 450 VRMS, independent power supplies for both sides of the circuit, and can also operate as a logic level shifter. Pololu 5746

4-channel digital isolator based on the Texas Instruments ISO6540F, providing galvanically isolated digital signal transmission at speeds up to 50 Mbps. The module features four forward channels (4/0), functional isolation up to 400 VRMS, independent power supplies for both sides, and can also be used as a logic level shifter. Outputs default to a low state (Default Low) in the event of input signal or power loss. Pololu 5741

4-channel digital isolator based on the Texas Instruments ISO6540, providing galvanically isolated digital signal transmission at speeds up to 50 Mbps. The module features four forward channels (4/0), functional isolation up to 400 VRMS, independent power supplies for both sides, and can also be used as a logic level shifter. Pololu 5740

Isolated SPST solid state relay (SSR) for switching loads up to 100 V and 4.5 A with a control signal from 2.7 V to 40 V. The module uses galvanic opto-isolation and a pair of MOSFET transistors, providing silent operation, bidirectional switching, and the ability to operate as a high-side or low-side switch. Pololu 5426

Rechargeable NiMH AA Battery: 1.2 V, 2200 mAh, 1 cell