Smoke detection in air
Smoke detector is a device that senses smoke, typically as an indicator of fire. Commercial smoke detectors issue a signal to a fire alarm control panel as part of a fire alarm system. Household smoke detectors, also known as smoke alarms, generally issue an audible or visual alarm from the detector itself or several detectors if there are multiple devices interlinked [1].
Lock-In Amplifier
Measure small signals in a large background (huge noise).
Component List
1) MODEL SR830 DSP Lock-In Amplifier
2) BWP34 Silicon PIN Photodiode
3) Oscillator (WAVESURFER 104MXS)
4) Capacitor(50V 22uF)
5) LED(Green)
6) Resistor(1.2K)
7) DC Voltage source (MATRIX MODEL: MPS-3005L-3)
Overall Setup
Schematics