week 7 FYP2

Objective
1. Testing coding relay interface to arduino working princple


Methodology
1. There many types of relay modules available like 1 relay, 2 relay, 5 relay and 8 relay but smart metering are using the 2 relay Arduino module
2.The first one has 4 pins, a Ground and a VCC pin for powering the module and 2 input pins In1 and In2. The second set of pins has 3 pins with a jumper between the JDVcc and the Vcc pin.
3.The input pins of the module work inversely. As we can see the relay will be activated when the input pin will be LOW because in that way the current will be able to flow from the VCC to the input pin which is low or ground, and the LED will light up and active the relay. When the input pin will be HIGH there will be no current flow, so the LED will not light up and the relay will not be activated

Result
the result shows, LED is indicator when coding has been upload and active. When LED became red means active HIGH there will be no current flow,  active LOW current will flow. 

Result 

So that’s how we can control any High Voltage Device using Arduino or actually any other microcontroller. And of course the possibilities are now endless, for example we can control the devices using TV Remote, Bluetooth, SMS and Internet