This RTC module is based on the clock chip DS1307 that provides seconds, minutes, hours, day, date, month, and year information.

   Features :

• Operating voltage: 5V.
• Supports the 24-hour or 12-hour format with an AM/PM indicator.
• Interface: I²C.
• On-board CR2032 3V lithium battery.
• Four (Ø 3.5mm) mounting holes for easy installation.
• Dimension: 33 X 30 X 10mm.

Serial UART Module converts serial RS232 to TTL signal using MAX232 IC. It can be used to interface RS232 devices like PCs and some LCDs to microcontrollers and Arduino boards. This module can be used with many microcontrollers (AVR, PIC, Intel, etc), and allows bidirectional communication (converts signals from TTL level to RS232 and from RS232 level to TTL).

  Features :

• Converts signals from RS232 to TTL and vice versa.
• Compatible with many microcontrollers.
• Operating voltage: 5V.
• Supports two channels ( Two pairs of Rx, Tx).
• Red LED indicator for each transmitting signal.
• Yellow LED indicator for each receiving signal.
• Green LED for power indication.
• All Signals are provided through both pin headers and screw clamp terminals for flexibility.
• Pins are clearly labeled according to their function.
• Pin header pitch distance 2.54mm.
• Screw terminal pitch distance 3.5mm.
• Four (Ø 3.5mm) mounting holes for easy installation.
• Dimensions: 55 X 35 X 12mm.

This module detects whether AC input exists.

  Features :

• Input voltage range 110-250V.
• Output voltage range 3-24V.
• Input is opto-isolated for safety.
• Four (Ø 3.5mm) mounting holes for easy installation.
• LED indicator for AC input.
• Output and power pins are broken out into a pin header for easy interfacing.
• Dimensions: 96 X 51 X 15mm.

2-Channel 24V relay module up to 10A rated current active high/low trigger directly interfaced to microcontroller or TTL logic with opto-isolation.

  Features : 

• LED indicator for each output relay.
• Both normally open and normally close are available.
• Contact current up to 10A (Resistive load).
• Isolated/non-isolated operation mode.
• Active high/low trigger operation.
• Input signals can be applied through screw terminals or pin headers for flexibility.
• Separated screw terminal power input for relay contact (isolated mode).
• Reverse polarity protection.
• Four (Ø 3.5mm) mounting holes for easy installation.
• Dimension: 66 X 47 X 20mm.

2-Channel 12V relay module up to 10A rated current active high/low trigger directly interfaced to microcontroller or TTL logic with opto-isolation.

  Features :

• LED indicator for each output relay.
• Both normally open and normally close are available.
• Contact current up to 10A (Resistive load).
• Isolated/non-isolated operation mode.
• Active high/low trigger operation.
• Input signals can be applied through screw terminals or pin headers for flexibility.
• Separated screw terminal power input for relay contact (isolated mode).
• Reverse polarity protection.
• Four (Ø 3.5mm) mounting holes for easy installation.
• Dimension: 66 X 47 X 20mm.

Power supply module for breadboard applications (3.3V, 5V, and VDC).

  Features : 

• Input voltage range 6.5V >> 15V.
• Output voltages 3.3V, 5V, and Vin.
• Output 5V (USB type A female socket).
• Output voltages are available via screw terminal block and pin header for flexibility.
• ON/OFF switch.
• Reverse polarity protection.
• Over current protection (1A).

This USB hub has four USB 2.0 ports each with a max total transmission speed of up to 480 MBps. All four ports are powered through the USB-B cable.
This hub is great for giving your laptop or computer a few more plug-in options, no adapter is required.

  Features: 

• Number of ports: 4.
• no adapter is required.
• PC interface: USB type B.
• USB device interface: USB type A.
• Output: 100mA MAX.
• Two (Ø 3.5mm) mounting holes for easy installation.

5A Current Sensor Module (ACS712).

  Features:

• Operating voltage: 5V.
• Green LED for power indication.
• Input interface 5.08mm screw clamp terminal.
• Power and output signal interface: 2.54mm male pin header.
• Maximum current: 5A.
• Dimension: 30 X 13 X 12mm.

ESP-01 programmer adapter, USB (CH340) to ESP8266 WiFi development board module.

This RTC module is based on the clock chip DS1307 that provides seconds, minutes, hours, day, date, month, and year information.

  Features :

•  Operating voltage 5V.
•  Supports the 24-hour or 12-hour format with an AM/PM indicator.
• Interface: I²C.
• On-board 4K I²C serial EEPROM.
• On-board CR2032 3V lithium battery.
• Two (Ø 3.5mm) mounting holes for easy installation.
• Dimension: 36 X 24 X 10mm.

1-Channel 24V relay module up to 10A rated current active high/low trigger directly interfaced to microcontroller or TTL logic with opto-isolation.

  Features :

• LED indicator for each output relay.
• Both normally open and normally close are available.
• Contact current up to 10A (Resistive load).
• Isolated/non-isolated operation mode.
• Active high/low trigger operation.
• Input signals can be applied through screw terminals or pin headers for flexibility.
• Separated screw terminal power input for relay contact (isolated mode).
• Reverse polarity protection.
• Four (Ø 3.5mm) mounting holes for easy installation.
• Dimension: 66 X 30 X 20mm.

1-Channel 12V relay module up to 10A rated current active high/low trigger directly interfaced to microcontroller or TTL logic with opto-isolation.

  Features :

• LED indicator for each output relay.
• Both normally open and normally close are available.
• Contact current up to 10A (Resistive load).
• Isolated/non-isolated operation mode.
• Active high/low trigger operation.
• Input signals can be applied through screw terminals or pin headers for flexibility.
• Separated screw terminal power input for relay contact (isolated mode).
• Reverse polarity protection.
• Four (Ø 3.5mm) mounting holes for easy installation.
• Dimension: 66 X 30 X 20mm.

1-Channel solid state relay module (5V) 240VAC/2A directly interfaced to microcontroller or TTL logic.

  Features : 

• Input signal: 5V (active high).
• Maximum output current: 2A.
• Maximum output voltage: 240VAC.
• 2 Ampere overcurrent protection fuse.
• LED indicator.

DB25 female socket on PCB to block terminals and pin header facilitates solderless connection to standard serial connector DB25 and is also suitable for breadboard test applications.

  Features :

• DB25 pins are routed to pin headers and screw clamp terminals.
• Both terminals are labeled according to the DB25 pin number to which they are routed.
• Pin header pitch distance 2.54mm.
• Screw terminal pitch distance 3.5mm.
• Four (Ø 3.5mm) mounting holes for easy installation.
• Dimensions: 93 X 33 X 15mm.

Serial UART Module converts serial RS232 to TTL signal using MAX232 IC. It can be used to interface PC to microcontrollers and Arduino boards. This module can be used with many microcontrollers (AVR, PIC, Intel, etc), and allows bidirectional communication (converts signals from TTL level to RS232 and from RS232 level to TTL).

  Features :

• Converts signals from RS232 to TTL and vice versa.
• Compatible with many microcontrollers.
• Works with any PC or laptop.
• Operating voltage: 5V.
• Red LED indicator for each signal.
• Green LED for power indication.
• Signals are provided through pin headers.
• Pins are clearly labeled according to their function.
• Pin header pitch distance 2.54mm.
• Screw terminal pitch distance 3.5mm.
• Four (Ø 3mm) mounting holes for easy installation.
• Dimensions: 55 X 35 X 12mm.

2-Channel relay module (24V) up to 10A rated current directly interfaced to a microcontroller or TTL logic.

This module provides an easy way to interface microcontroller to any load cell. It is based on HX711 IC which provides a high-resolution analog-to-digital converter and uses a two-wire interface (clock and data) for communication. A very accurate weight measurement can be obtained with some calibration.

  Features :

• Operating Voltage  2.7V- 5.5V.
• Operating Current: 1.5mA.
• Resolution 24 bit.
• Output data rate 10SPS or 80SPS.
• Operation temperature range: -40 ~ +85℃.
• Dimension : 38 X 30 X 3mm.

2-Channel relay module (5V ) up to 10A rated current directly interfaced to microcontroller or TTL logic.

Dual H-Bridge L298 IC driver to pin header breakout board, Suitable for DC Motor Driving or interfacing to L297 to easily build stepper motor driver.