ADI EVAL-CN0537-ARDZ

Since the 1970s, smoke detectors have become common in commercial and residential buildings. There are two basic types of detectors: ionization detectors, which use a radioactive material to ionize air and detect electrical imbalances, and photoelectric detectors, which use a light source aimed away from a photodetector at an angle and detect the photodetector current caused by light reflected off particles in the air onto a photodiode. Photoelectric smoke detectors are more popular due to their higher reliability in detecting common household fires and faster response to smoldering fires. Modern smoke detectors must be able to distinguish between cooking nuisance events and fire events. The circuit, based on the ADPD188BI optical module, is a tested and verified smoke detector reference design with available algorithms and datasets. The design is compatible with the Arduino form factor controller platform, and the combination of hardware and software enables evaluation of smoke and fire tests specified by UL 217 8th Edition and UL 268 7th Edition standards. Verified algorithms are available for immediate use, and additional data can be collected to supplement the algorithms for compatibility with other standards. The ADPD188BI optical module is a complete photometric system designed specifically for smoke detection applications, employing dual-wavelength technology with two integrated LEDs emitting light at 470nm (blue) and 850nm (infrared) respectively; analysis of its output data can meet the requirements of UL 217 and UL 268 standards.