We have built a very simple Motion detector circuit here. We are using a HC-SR501 PIR Sensor, an LED (which will glow whenever there is a motion infront of the sensor) and resistor. Vcc PIN of PIRs ...

Passive surveillance system; Active surveillance system; Now our goal is to built a passive surveillance system that acts as a human detector when the system is fired. The materials required for this ...

Circuit Diagram . The 555 timer is the most commonly used IC for many different applications, which is what the working of the circuit is very simple when the voltage at pin-2 falls below ⅓ of the VCC ...

Decision Sciences, a provider of advanced security and contraband detection systems launches its new Human Detection Capability for its Discovery® system at this year’s World Border Security ...

The circuit diagram of the motion detector using NE555 timer is shown in Fig. 1. It is built around 230V AC primary to 9V, 300mA secondary transformer X1, bridge rectifier DB107 (BR1), 6V voltage ...