AV to HDMI converter

The protection circuit for one Li-Ion cell with a voltage of 3.7 V. It has the function of charging, discharging and over-discharge protection. The cells can be discharged with a continuous current of up to 8 A

An efficient step-down converter that steps down the input voltage from as low as 45 V to a regulated output voltage range of 1.4 to 7 V, offering high efficiency and a maximum continuous current of 3.4 A. It has built-in reverse polarity, overload and short circuit protection, and the spread spectrum function reduces EMI interference. Pololu 4873

2-channel module with relays, designed to work with the Raspberry Pi. It can switch 250VAC/7A or 30VDC/10A signals. SB Components 14088

USB - UART converter based on the FT232RL chip. Compatible with voltages of 3.3 V and 5 V, it is equipped with a microUSB connector. Cytron UC00A

This step-down converter module allows you to reduce the voltage from 3.5-60V to a stable 3.3V at a current of up to 12A. Its high efficiency of up to 95% and low power losses make it ideal for applications requiring high current and stable power. The device features built-in overcurrent, thermal, and reverse connection protection, as well as a soft-start function and a Power Good indication. Pololu 5670

The module protects the load against reverse polarity to -60 V, but does not block reverse current, which is desirable in applications such as motor control. It uses the LM74500-Q1 controller and a MOSFET transistor. Thanks to its low impedance (10 mΩ), it supports currents up to 10 A continuous and 30 A transient, providing reliable protection and the possibility of easy assembly. Pololu 5380

Module with 8 SSR relays with a load of up to 3 A. The board communicates via the Ethernet interface. Numato Lab 8ETHSSR001-AC

Converter that provides easy communication between the RS232 and RJ45 Ethernet interface. Configurable via web page or AT commands. USR-DR301

16-channel GPIO expander with an I2C interface microcontroller can interface with 16 fully configurable digital input/output pins. It can produce PWM signals, so you can dim LEDs. It can be set to blink or even breathe pins at varying rates. With a built-in keypad engine, it can interface with up to 64 buttons set up in an 8x8 matrix. BOB-13601

Adapter for audio signals with RCA connectors, Jack 3.5 mm, screw connection and XH 2.54 mm

Fingerprint Scanner - TTL (GT-521F52)

Module with 4-channel ADC ADS1115 converter. The system enables analog voltage conversion for single signals and differential signals with 16-bit resolution. I2C communication

Module with 16-channel IO expander MCP23017 controlled by the I2C interface. Designed for minicomputers Raspberry Pi. Adafruit 4132

Module with 4-channel ADC ADS1015 converter. The system enables analog voltage conversion for single signals and differential signals with 12-bit resolution. I2C communication

The Class D digital audio amplifier module has two channels with a power of 30 W and can work with speakers from 4 to 8 Ω. Powered with the voltage ranging from 8 to 26 V. Bluetooth communication

The LM317 + LM337 Symmetrical Power Supply provides stable and smoothly regulated symmetrical voltage for electronic and laboratory applications. Suitable for powering audio systems, preamplifiers and test projects where stable, regulated symmetrical voltage is essential. Requires consideration of proper cooling to maintain optimal operating conditions