In this post you will get the information about how to automate our home appliances using some small electronic devices with less cost in step by step procedure.
Relay Switch Module is the specially designed PCB board with Relay Switch in it.
See the video to know, what is a relay? What are the pins available in it? What is its internal mechanism? How the relays are categorised? and how to interface it with Arduino Uno Board?
This is the video which give you some details about the HC 05 Bluetooth Module. The video gives you the basic hardware and software features of HC 05, Parts in HC 05, How to connect Hc 05 with Arduino and How the transferring of data is done.