Smoke/ Carbon monoxide sensor. When smoke or high level carbon monoxide gas is detected, these devise are designed alert your family for safety. more...
Carbon Monoxide Sensor Item Code: MQ-7 Application: The drive circuit is very simple , just a voltage devider; all you need to do is power the heater coil with 5V DC or AC , add a load resistance, and connect the output to an ADC or a simple OPAMP comparator. more...