It is based on the working of the popular IR sensor Module TSOP1738 which senses 38 kHz Infrared pulses from the IR LED of the transmitter. Range of the circuit is about 5 meters if the transmitter ...

Here is one simple circuit of a general-purpose white LED security light with Passive Infrared (PIR) Motion sensing mechanism. At the heart of the circuit is a PIR sensor module SB0061. SB0061 is a ...

In this article, we implement a rain and ice sensor by analyzing the reflection ... where +12 V is the main voltage source. 3. IR LED driving circuit. Based on experience, the TIP121 Darlington ...

But the circuit in the figure shows an infrared close-object alert system built around two popular and less expensive integrated circuits ... sensor contains a phototransistor and an infrared LED.