This document is a technical reference sheet for students, hobbyists or engineers learning about fundamental sensor types. It covers four main sensor categories: ultrasonic, PIR, LDR and piezoelectric. For each sensor it lists the physical input, working mechanism and electrical output. The text also includes a block diagram placeholder and contact details for RMB Enterprise. The content is…
This document is a technical reference sheet for students, hobbyists or engineers learning about fundamental sensor types. It covers four main sensor categories: ultrasonic, PIR, LDR and piezoelectric. For each sensor it lists the physical input, working mechanism and electrical output.
The ultrasonic sensor section describes how it emits high-frequency sound waves and measures echo return time to produce a voltage pulse proportional to distance. The PIR sensor detects changes in infrared heat radiation from moving warm bodies and outputs a high/low digital voltage signal.
The LDR sensor changes its resistance based on light intensity (photons) and provides a variable analog resistance or voltage. The piezoelectric sensor generates an electric charge when compressed or vibrated, outputting an analog AC voltage signal.
The document also includes a block diagram placeholder and contact details for RMB Enterprise. The content is presented as a concise comparison table, suitable for quick study or classroom handouts.