Home » Security

2 Simple Motion Detector Circuits using PIR

PIR with delay ON alarm

The post discuses two simple motion detector circuits using op amp and transistor. We also discuss the pinout details of the standard passive infrared (PIR) sensor RE200B. The first circuit uses an op amp, while the second design works with a single transistor and relay for detecting the IR radiation from a moving human body … Read more2 Simple Motion Detector Circuits using PIR

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 empty, and needs a replacement. The warning circuit will help doctors and the concerned employees to concentrate on other important matters while the drip systems … Read morePatient Drip Empty Warning Indicator Circuit

3 Simple Proximity Sensor Circuits

Three useful proximity sensor concepts are explained here, the first concept is based on an ordinary opamp LM358, the second one using IC LM567 which functions with a phase locked loop principle ensuring very accurate response for the detection. The third circuit works using the ubiquitous IC 555. Let’s learn each one with a step … Read more3 Simple Proximity Sensor Circuits

Car Reverse Parking Sensor Circuit with Alarm

In this post we are going to construct a car reverse parking sensor alarm circuit using arduino, ultrasonic sensor and 2.4 GHz transceiver module. This project can be add-on feature for your car if it doesn’t sport a build-in parking sensors. Introduction The proposed project has similar functionality as traditional car parking sensor has, such … Read moreCar Reverse Parking Sensor Circuit with Alarm

Car Tank Water Sensor Circuit

The article explains a simple car tank water sensor alarm circuit using IC 555 and a pulsating signal on the sensing probes to pevent corrosion on the probes. The idea was requested by Mr. Peter. Circuit Objectives and Requirements I couldn’t find how to post a project proposal on your website. May be you can … Read moreCar Tank Water Sensor Circuit

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 was requested by Mr. Collins. Circuit Objectives and Requirements I just want to tell you what an amazing passion and dedication to electronics you have … Read more3 Smart Laser Alarm Protection Circuits

Do NOT follow this link or you will be banned from the site!