Lets make a motion activated switch using PIR sensor, BC547 transistor and 5v relay.
Let's learn how to use a touch switch with a single relay or relay channel to control the relays. So that we can drive high voltage appliances using touch switches.
Here we are going to learn about how to use LDR (Light Dependent Resistor) with Arduino and we are going to do a small project based on the LDR sensor.
Let's learn to control our home appliance using the TV or DVD player remotes or smartphones phones like Xiaomi which is having an inbuilt IR transmitter.