In this post we are going to explore the datasheet of PIR or Pyroelectric Infrared Radial Sensor HC-SR501. We will understand for what purpose PIR sensor is used? Its basic […]
Patient Drip Empty Warning Indicator Circuit
In this post we will learn about a simple mechanism, and a circuit which will enable a patient’s IV drip bottle system to sound an alarm whenever it gets almost […]
3 Smart Laser Alarm Protection Circuits
The post discusses the making of 3 simple yet effective smart laser alarm protection circuit using the IC 555, for securing a specified restricted zone from human interventions. The idea […]
Mains High Low Voltage Protection Circuit with Delay Monitor
The post explains an upgraded version of my previous mains 220V/120V high-low voltage cut off protection circuit which now includes a delayed restoration of power for the load with 3 […]
Intruder Position Indicator Security Circuit
The post explains an LED based intruder position indicator circuit which will indicate the position of the burglar throughout the secured corridor as the person tries to sneak past the […]
SMS Based Laser Security Circuit
In this post, we are going to construct a laser security circuit which can send SMS alert to owner of the property or anyone else and activate loud alarm to […]