.:madworm:.'s photos with the keyword: detector

Optical smoke sensor

Optical smoke sensor

.:madworm:.
01 Jul 2013 299
With no small particles in the air, the IR beam goes straight into the wall of the housing. The wall is black and absorbs a great deal of the radiation. The little fins might be angled in such a way that the reflected radiation bounces around many times, which further attenuates it. Ideally nothing ever hits the sensor. The main purpose of this construction is to allow smoke-carrying air penetrate the walls, but keep ambient light out. When tiny smoke particles are present in the center of the sensor, they scatter some of the IR light towards the sensor. You hear a very load beep.
Optical smoke sensor

Optical smoke sensor

.:madworm:.
01 Jul 2013 205
The MC145010P is the brains of the circuit.
Optical smoke sensor

Optical smoke sensor

.:madworm:.
01 Jul 2013 194
The MC145010P is the brains of the circuit.
Smoke detector - PCB

Smoke detector - PCB

.:madworm:.
01 Jul 2013 206
Smoke detector - PCB

Smoke detector - PCB

.:madworm:.
01 Jul 2013 189
The MC145010P is the brains of the circuit.
Smoke detector - weak buzzer

Smoke detector - weak buzzer

.:madworm:.
01 Jul 2013 156
Smoke detector / alarm

Smoke detector / alarm

.:madworm:.
01 Jul 2013 185