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AN50956 - Infrared Proximity Detection with PSoC® | Cypress Semiconductor

AN50956 - Infrared Proximity Detection with PSoC®

Last Updated: 
Jul 27, 2015
This is an Obsolete Application Note
The document AN50956 - Infrared Proximity Detection with PSoC® has been marked as obsolete. The obsolete version of this application note is still available with the below description but may not be complete or valid any longer. If you have any questions or require support in regards to the below application note content, please click here and create a technical support case.

For CapSense based proximity detection, refer to AN92239

AN50956 describes the interface and signal processing for infrared proximity detection using PSoC®. An example project and a circuit are used to demonstrate the application.


Infrared sensors are light sensors, which are active and function in the infrared part of the frequency spectrum. They primarily consist of an infrared emitter and an infrared receiver. They are found in many object detection applications such as automatic door openers and burglar alarms, surface feature detection, rotation shaft encoding, and barcode decoding. Some recently used applications in mobile devices include auto call-answering, auto speaker phone activation, and detection of flip-in-clamshell phones.