The Arduino Pro Mini is a microcontroller board based on the ATmega328 that does not come with connectors populated so that you can solder in any connector or wire with any orientation you need. It has Max 150mA output and 5V regulator. It supports  auto rest and has On board Power and Status LEDs. Its weight is less than 2g. To provide USB power and communication to the board a six pin header can be connected.It has the features of over current protection and reverse polarity protection.

Arduino Pro Micro Usb is an ATmega32U4 board  running at 5V/16MHz. It is the smallest Arduino –Compatible board. It has high speed PWM with programmable and resolution from 2-11bits.it is Supported under Arduino IDE v1.0.1. it can accept voltage up to 12VDC. It has USB connectivity on-board and on board power and status LEDs.

 Arduino nano  is a smallest, complete, and breadboard friendly board that includes a serial monitor . It can be powered via Mini-B USB connection. The Arduino Nano can be programmed with the Arduino software which we can download via official website. It also contains automatic reset .It also contain manual reset switch. The power source is automatically selected to the highest voltage source in arduino nano.

The Arduino Ethernet Module is a compact Ethernet Module with the ENC28J60 Ethernet controller chip, LAN connector and SPI interface for the microcontroller, arduino, avr, pic and so on. This Arduino Ethernet Module helps us to connect our projects to the network and the internet and run a web server or web client.

The Arduino Ethernet Shield Clone is an Ethernet Controller Board with W5500 Ethernet Controller which allows us to connect to internet through ICSP (In-Circuit Serial Programming). This Ethernet Shield Clone Module communicates with Arduino Mega Board through SPI connection with ICSP pins. Its operating power supply is 5V which is supplied from Arduino Mega 2560. It also has an Onboard SD Card slot which helps in Read/Write operation.

The Lilypad   Arduino is based on ATmega 168V or ATmega328V Microcontroller designed for wearables and e-textiles. It can be sewn to sensors and actuators with conductive thread, fabric and similarly mounted power supplies.

The LilyPad Arduino USB board is  based on the microcontroller ATmega32u4. It can be simply connect it to a computer with a USB cable or power it with a battery to get started. It has wearable e-textile technology with USB support.  This board also has JST socket to directly connect to a Li-Po battery with feature of battery rechargeable through the board. It is also supported by Arduino IDE 1.0.2 and up.

1. The ULN2003 Stepper Motor Driver Module is a Driver Module for stepper motor which is based on ULN2003 controller IC. It has A, B, C, and D four-phase LED that indicates the status of the stepper motor work. It can be suitable for using in high-power stepper motors for various DIY projects

This mini electronic product is designed for e-textiles and wearables projects. This product can be joined to fabric and also mounted power supplies, sensors, and actuators with conductive thread. It has only 9 pins for input/output. It is just a connector and a built-in charging circuit for Lithium Polymer batteries. 

Arduino pro micro with type C USB 

• Processor: ATmega328
• Working voltage: 5V
• Input voltage (recommended): 7-12V
• Digital IO pins: 14 (6 of which are used as PWM outputs) (D0~D13)
• Analog input pins: 6 (A0~A5)
• IO pin DC current: 40mA
• Flash Memory: 32KB
• SRAM: 2KB
• EEPROM: 1KB (ATmega328)
• Working clock: 16 MHZ
• PCB Size: 43mm x 18mm

The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one.