The BC548 is a general purpose epitaxial silicon NPN bipolar junction transistor. It is used for amplification and switching purposes.The maximum DC current gain is 800. 

Order Code : RDL/TRB/13/001/V1.0

 It is a 3mm diameter round head, 2 pin terminal for reliable connection, it can create bright red LED light.Ideal for color displays, indicators, diagnostic or analytical equipment and etc.

Order Code :  RDL/RED/13/001/V1.0

General Purpose Dotted PCB with holes 0.1 inches apart.

Order Code : RDL/GPP/13/001/V1.0

It is a 5mm diameter round head, 2 pin terminal for reliable connection, it can create bright red LED light.Ideal for color displays, indicators, diagnostic or analytical equipment and etc.

Order Code : RDL/RL5/13/001/V1.0

This is an IC base for 8 Pin IC's. This base is very useful for your circuit because if your IC burns out you can easily change the IC without the need of desoldering. 

Order Code : RDL/8PB/13/001/V1.0

This is an IC base for 16 Pin IC's. This base is very useful for your circuit because if your IC burns out you can easily change the IC without the need of desoldering. 

Order Code : RDL/16PB/13/001/V1.0

This is an IC base for 28 Pin IC's. This is used as a place holder for the 28 pin IC chips and is used in order to allow safe removal and insertion of IC chips because IC chips may become damaged from heat due to soldering.This base is very useful for your circuit because if your IC burns out you can easily change the IC without the need of desoldering. 

Order Code : RDL/28PB/13/001/V1.0

DB9 ports are very common on most types of microcontroller, where they can be used to communicate with a PC or other serial devices.

Order Code : RDL/DBF/13/001/V1.0

DB9 ports are very common on most types of microcontroller, where they can be used to communicate with a PC or other serial devices.

Order Code : RDL/DBFP/13/001/V1.0