Gas and Vapour Detectors Circuits
Gas Sensor - All-in-one (with a sensor and a temperature compensation device)
Flame/Smoke Detector - Flame, gas and smoke detector for fire alarm. You can combine this circuit with alarm circuit. The output will be the relay which switch on and switch off the alarm.
Toxic Gas Detector and Alarm Circuit with
TGS813 - The danger always exists, when
the fuel gases such as propane or gas are
confined to a small area. The alarm of toxic
gases figs. 1-45 utilizes a
tin-oxide-semiconductor. A coil of thin wire
heated by a battery 12 V via IC1 and IC2,
which pulses the voltage to the coil of the
sensor, saving a significant amount of
energy. Diode Zener Dl provides a constant
voltage to the filament coil sensor.
resistance of the sensor reduces the sensor
is exposed to toxic gases such as hydrogen,
carbon monoxide and propane.
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