It can also be used for testing infrared burglar alarm systems. This is not an infrared motion detector! The IR detector circuit in principle, converts the IR signal pulse trains into noticeable aural ...

With minimal external components, this smoke detectors alarm circuit will provide all the required features for a photoelectric smoke detector type electronic project. The design incorporates a ...

But the circuit in the figure shows an infrared close-object alert system built aroun Many robotic applications require a sensor to detect close or very close obstacles. Typically, reflective-type ...