Features:
- Uses LM358P operational amplifier controller.
- Uses MQ-2 Gas Sensor to detect smoke and gas presence.
- This kit is able to control external devices via relay.
- Non-programmable kit.
- Recommended input voltage: 6V DC.
- Self assembly.
- Size: 46 mm x 49 mm
- Light bulb is not included.
Description:
This kit is designed to control the relay by sensing smoke and gas presence. When the smoke or gas is present, the relay as output will be activated. In this kit, the LM358 operational amplifier is used as a comparator to compare voltage at the non-inverting input (+) and at the inverting input (-). When the voltage at inverting input pin (MQ-2 Gas Sensor) of the LM358 is higher than the voltage at non-inverting input pin (10k Ohm Potentiometer), the LED and relay will be turned on. The LED and relay will be turned off when the input voltage at inverting input is lower (MQ-2 Gas Sensor) than the voltage at non-inverting input. The LED and relay is turned on when the voltage from the MQ-2 Gas Sensor is higher than the pre-set voltage at the potentiometer. For the gas sensor, when smoke or gas is present, the voltage increases and the resistance decreases. For the potentiometer, the voltage of potentiometer is changed by tuning it. It is used to set the smoke and gas sensitivity level.
Example Project: Smoke Detector Alarm with MB-07
Features:
- Uses LM358P operational amplifier controller.
- Uses MQ-2 Gas Sensor to detect smoke and gas presence.
- This kit is able to control external devices via relay.
- Non-programmable kit.
- Recommended input voltage: 6V DC.
- Self assembly.
- Size: 46 mm x 49 mm
- Light bulb is not included.
Packaging list:
- 1x MB-07 Smoke and Gas Detector Hobby Kit
- 1x MB-07 Smoke and Gas Detector Hobby Kit User's Manual V1.0
Attachment:
Packaging list:
- 1x MB-07 Smoke and Gas Detector Hobby Kit
- 1x MB-07 Smoke and Gas Detector Hobby Kit User's Manual V1.0
