CP2102 USB 2.0 to RS232 RS485 TTL 3.3V 5V converter

A multiplexer of this type actually only acts as a switch 16 to a 1.
The 4 digital pins are used to set high or low, (binary Y0-Y15) to determine which input pin is connected to pin "Z".
The control input S0-S3 is set to low "logic level 0", the signal C0 is connected to the output Z. Multiplexer 16 Channels CD74HC4067 MUX/DEMUX features:
- Based on chip CD74HC4067
- Analog signal input: Y0-Y15, 16 channels
- Analog signal output: Z pin
- Digital input, channel control: S0-S3
- Module size: approx. 4 x 1.8cm
- Package includes:
* 1 x CD74HC4067 MUX connection module
* 2 x row of soldering pins

Converter RS232/485/422 to Ethernet RJ45 has been designed for the industrial environment. It combines multiple functions including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc. The module has an RS232/485/422 and Ethernet port (PoE function).Suitable for applications such as data acquisition, IoT gateway, IoT security. and smart device monitoring.

FTDI FT232RL USB-UART Converter - Mini USB features:
- Serial Converter USB-TTL 3.3V - 5V
- LED indicator of Tx, Rx, power.
- Communication: TTL COM Virtual RS232 RX / TX Transceiver
- Voltage: 3.3V or 5V - per bridge
- Pins: DTR, RX, TX, VCC, CTS, GND
- Protections: Electronic fuse up to 500mA.
- Size: 46 x 19 mm. Step 2.54mm.
- Connection: Mini USB
- Driver: Windows 7 / 8/10 Linux / Mac / Android
- USB TO UART solution with mini USB connector
- FT232RL original on board
- Compatible with Mac, Linux, Android, WinCE, Windows 7/8 / 8.1 / 10 ...
- 3 power mode: 5V output, 3.3V output or powered by the destination board (3.3V-5V)
- 3 LEDs: TXD LED, RXD LED, POWER LED
- Functional pins

This FTDI breakout is a super small board with a standard FT232RL USB to serial IC circuit. The pinout fits FTDI cable making it compatible with any Arduino or Arduino compatible 5V boards.

This module equipped with a PCF8591 converter has a low current power supply and includes 8 bit CMOS data acquisition devices.
Your converter has four analog inputs, one analog output and one I2C serial bus interface.
It is supplied in the voltage range 2.5V-6V, analog voltage between the negative potential VSS and positive VDD. The control and data signals are transmitted on the two-wire I2C bi-directional bus to the transformed series.
The intensity of the ambient light can be converted into a digital signal thanks to its integrated photoresistor.
It allows access to eight PCF8591 converters on the same I2C bus without additional equipment. Converter Module AD-DA PCF8591 - Analog Voltage 2.5V-6V features:
- Supply voltage (between VSS and VDD): 2.5-6VDC

This is a CH340G TTL UART 5V serial adapter, designed to allow adding a USB connection to your project.
In addition, this opens up the possibility of programming microcontrollers like the Arduino Pro mini.
This module allows you to connect your project, from programming small microcontrollers to a custom computer keyboard.
The module is ready for use of a UART connection.
This may require the installation of a driver; however, it is a standard driver distributed by Microsoft Windows Update, available in Linux and that can be configured in MAC OS.
Adapter module CH340G LC Technology -TTL UART 5V series features:
- Manufacturer: LC Technology,
- Communication chipset: CH340G
- Communication: UART,
- Pin connection:

The ADS1115 is an external 16-bit ADC + a built-in programmable gain amplifier (or PGA), which can be very useful for certain Arduino and ESP8266 projects. This is ideal when more resolution or more analogue pins are required. You get better accuracy, as well as relieving the processor of this burden.

The PCF8591 is a low-power 8-bit single-chip, single-chip, 8-bit data acquisition device with four analog inputs, an analog output, and an I2C serial bus interface.
Three address legs A0, A1 and A2 are used to program the hardware address, allowing the use of up to eight devices connected to the I2C bus without additional hardware.
Address, control and data to and from the device are transferred in series through the two-way bidirectional I2C bus. Analogue to Digital Converter PCF8591T features:
- Main chip: PCF85911
- Operating voltage supply: 2.5 - 6 V
- Low standby current
- Serial input / output through the I2C bus
- 3 hardware address pins A0, A1, A2
- Sampling speed given by the I2C bus speed

An RS232 serial port to your PC through the USB port USB 2.0 A Serial Port Cable Adapter DB9 RS232 Series features:
- CH341 driver
- Supported OS: WinME, Win2003, Win XP, Vista, Win 7, Linux, MAC OS9.0/OSX
- High quality, shielded cable
- Power and data in the same cable, does not require more adapters
- Compatible USB interface 1.1 and 2.0
- Support up to 1 mega data transfer
- Length 73cm The adapter allows you to connect a computer with: - Electric meters
- Decoders, programmers
- Cash registers
- Satellite TV
- Control panels
- Mobile phones
- Diagnostic interfaces for cars
- The administration of Cisco routers

TTL level conversion module 5V 3.3V IO Single Interchange Compatible I2C SPI.
Use of high-speed dual-level IT supply level translator chip design. TTL Level Converter 5V - 3.3V IO LJ245A features:
- Main chip: Octal bus transceiver and change from 3.3-V to 5-V with outputs of 3 states LJ245A of Texas Instrument
- VCCA power supply voltage: 4.5 - 5.5 VDC
- VCCB power supply voltage: 2.7 - 3.6 VDC
- Low level input voltage V (IL): 0.8 V
- High-level input voltage V (IH): 2 V
- Low level output current I (OL): 12 - 24 mA
- High level output current I (OH): -24 - -12 mA
- 8 channels allow the conversion of the IO communication level
- Channel levels A and B are controlled by VCCA and VCCB