Many residential and commercial building is required to have fire and carbon monoxide (CO) detectors located in specific places around the structure as regulations permit. These alarm systems can be cut off from other sections of the building or home, making an isolated fire more likely to spread to other sections of the building, if the alarm is outside of the inhabitants hearing range.
A gas sensor is a device which detects the presence or concentration of gases in the atmosphere. Based on the concentration of the gas the sensor produces a corresponding potential difference by changing the resistance of the material inside the sensor, which can be measured as output voltage.
This design guide addresses the component selection, design theory, and the features of the reference design For a Carbon Mono oxide(CO) Sensor. This design guide gives system designers an outlook of integrating low-power, cost-optimized analogue components, and ultra-low-power based wireless micro-controlled platform.
Some of the features of the design are –
- The operating voltage of the circuit is 130 Volt AC and 3.7 Volt DC.
- The circuit is imbibed with an onboard printed antenna for wireless transmission.
- The design operates in two different frequency of 3-kHz and 520-Hz.
- The design is based on the detection of Carbon Monoxide (CO) and Alarm Activation
- The circuit is designed to be suitable to fir on a Wall.
- The design features Auxiliary Battery Backup which helps in maintaining power sources during Power Outages.
- The design provides an adjustable Microphone Gain which is based on Proximity sensed by the device.
- The design is based on providing Sub-1 GHz Wireless Communication for Sensor-to-Cloud Configuration.
The design offers a solution to a number of applications such as Alarm Detection systems, Smart Sensor Ecosystems, Fire Safety Systems and Building automation.