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Expansion board with LoRa E22-900T22S module for Raspberry Pi. Allows communication in the 868 MHz frequency band. Waveshare SX1262 868M LoRa HAT

Three-way crossover with a crossover frequency of 1000 Hz and 5000 Hz. It works with speakers with an impedance of 5 to 8 Ω and offers power up to 180 W

Hybrid bipolar stepping motor with integrated 38cm (15″) threaded rod as its output shaft, turning it into a linear actuator capable of precision open-loop positioning. The motor has a 1.8° step angle (200 steps/revolution) and each phase draws 1.7A at 2.8V, allowing for a holding torque of 3.7kg-cm (51 oz-in). Pololu 2690

Three-way crossover with a crossover frequency of 900 Hz and 5000 Hz. It works with speakers with an impedance of 5 to 8 Ω and offers power up to 150 W

QUICK Q-T-2B series soldering tip designed for use in: 236/706/936A/3104/3102/TS1100

The Pololu A-Star 32U4 Prime is a general-purpose programmable board based on Atmel’s ATmega32U4 AVR microcontroller and arranged in the common Arduino form factor exemplified by the Uno R3 and Leonardo. Pololu 3114

Self-assembly case designed for minicomputers Odroid H3 and Odroid H3+. Equipped with a place for a network card. Hardkernel ODROID-H3 Case Type 6

Probe for measuring direct and alternating current up to 30 A. Works in the band up to 50 MHz, can be connected to the oscilloscope through the BNC connector. Powered by USB. Micsig CP503B

Crossover for woofers with a division frequency of 300 Hz. Works with 4 to 8 ohm speakers and offers up to 200 watts of power

Two-way speaker crossover with a dividing frequency of 2800 Hz. Works with 4 to 8 ohm speakers and offers up to 350 watts of power

A 2.8" LCD IPS touchscreen module with a resolution of 320x240 pixels. It uses SPI interface for image display and touch panel. Waveshare 2.8inch Resistive Touch LCD

Two-way speaker crossover with a division frequency of 2500Hz/3000Hz. Works with 4 to 8 ohm speakers and offers up to 250 watts of power

Two-way speaker crossover with a division frequency of 3300 Hz. Works with 4 to 8 ohm speakers and offers up to 50 watts of power

A pair of banana (angled) connectors dedicated to audio devices

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

A high-power power supply module based on the LT1083CP voltage stabilizer. It has an adjustable output voltage from 1.25 to 48 V DC and an output current of up to 10 A

High-power dual power supply module based on LT1083CP voltage regulators. It has an adjustable output voltage from 1.25 to 48 V DC and an output current of up to 10 A. It provides power for both channels in stereo audio amplifiers

A set of two speakers with a power of 5 W and an impedance of 8 Ω. Finished with a 4-pin connector. Waveshare 8Ω 5W Speaker

Four degrees of freedom (4DOF) robotic arm assembly kit. The robotic arm was based on servos and is controlled wirelessly using a Raspberry Pi. Waveshare Robot Arm for Pi (for Europe)