in this tutorial, I am going to show you how to make simple home automation using tv remote

this circuit uses a TSOP1738 IR receiver module in normal condition, the output pin of the IR module is  High, which means the transistor  (bd140 PNP) is at logic Low. but when ir signal fall to tsop sensor the output of tsop goes low and transistor will turn on. the output of the transistor is connected to a toggle switch constructed with cd 4017 counter ic

circuit diagram

componets needed

BC547B

Transistor BD140

1N4007

1K resistor

CD4017

TSOP

RELAY

100UF capacitor