Arduino Fire Alarm 1.0
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Arduino Fire Alarm 1.0[edit]
Fast detection, annoying alarm, saves your expensive toys from unexpected combustion!
Parts List[edit]
- Arduino Development Board (NG, Duemilanove, Diecimila... others can be used as well with some effort)
- Hamamatsu Photonics UV TRON Flame Sensor and driver circuit (sold separately, or as a kit)
- Radio Shack 102dB Piezo Siren (About $6 USD) RS Model # 273-079, self contained modulator.
- LED and associated current limiting resistor (you choose! You have 5 volts and some number of mA to play)
- Power supply with at least 9v but no more than 14 volts and a barrel connector that fits the Arduino.
- Perf board for soldering parts cleanly, or a breadboard.
- Simple transistor, three legged variety, used for controlling the 150 mA siren current
- Some wire to connect the sensor assembly to the perf board.
Schematic[edit]
Schematic forthcoming...
Arduino Sketch[edit]
Download the Arduino Sketch here: Arduino_Fire_Alarm_v1_0.pde
Known Issues[edit]
- The field of view of the sensor is wide, but not omnidirectional. Keep this in mind when you are positioning the sensor tube for an area of coverage.
- In our current Lazzzor installation, the work table blocks the sensor much of the time. The sensor will not likely be triggered unless a really large fire erupts. This isn't good enough, and so there will be a redesign of the sensor assembly to bring the tube above the work table. The distance between the driver board and the tube must be short, making this a challenging effort.
- The glass lid on the Lazzzor blocks the UV light emitted by flames, making it impossible to use the sensor externally with the lid closed.
Future Plans[edit]
- Add Twitter support via an Ethershield... Not super practical, but novel.
- Add a defeat switch w/timer in case of multiple false alarms. The defeat function would time out to prevent negligent disabling of the alarm.
- Using the Ethershield, implement an SNMP-like event trap scheme. This should allow the sensor to integrate into a larger alarm system.