Circuit Splash

This gate is mainly used in applications where there is a need for mathematical calculations. So calculators, computers and many digital applications use this gate.

Today I decided i wanted to build an alarm for my room, when I searched online all door alarms used the PIR sensor, unfortunately mine was faulty.

and that"s when I decided to build my own alarm using an ultrasonic sensor (HC-SR04),and I found out it was really simple.

IR Transmitter and receiver are used to control any device wirelessly, means remotely. TV remote and TV are the best example of IR transmitter and receiver. TV generally consist TSOP1738 as the IR receiver, which senses modulated IR pulses and convert them into electrical signal.

Here is a RF Controlled robot without using any microcontroller. This robot has two parts - one is RF transmitter circuit and other is RF receiver circuit. It sends RF signals through the transmitter which are received at receiver end and robot moves accordingly in the left, right, forward and backward direction.

The idea came to me when i was ready to replace a battery cell in my alarm clock next to my bed. Even i am using the last 5 years only rechargeable batteries of the most types i considered how many battery cells people around the world throw away in a simple move like that i did now