Smoke detector/alarm / Edwandy Afandi and Uma Baki Mohammad

A smoke detector is an important unit for any industrial firm. This smoke alarm is design to provide an alarm whenever smoke collects near the ceiling. The report summarized the introduction and application of smoke detector This circuit use a dc +12 voltage supply, 1C 555 (timer), PNP transistor to run the circuit. Most of the building, factory and etc use this design. This appurtenances normally used for high exertion and structure to stride up celebrate nightly tesitrities. It also familarly used as a conduct for signal as a next step for the action. The majority of erection that normally founded in using this appurtenances such as hospitals, schools, complex centre etc. The pay price for this appurtenances also fairly acceptable and congruent. The market soldered for this appurtenances none broad wide.