Electronics Circuit Diagram

A smoke sensor is a device that detects smoke, typically as an indicator of fire. There are two main types of smoke sensors: ionization sensor and photoelectric sensor. The following schematic shows the design of a Simple Smoke Sensor Circuit Board using LM1801. This circuit design utilizing two LDRs, one LED, one internal zener supply, two reference voltage outputs, one voltage comparator, fixing diodes and one 500mA output transistor. and LM1801.

The LM1801 is an extremely low power comparator with a high current open-collector output stage. The LM1801 includes a bias string comparator steering logic output transistor supply clamp low voltage detector and reference.

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