A very simple Ionization Smoke Detector with Interconnect and Timer alarm circuit can be constructed using the A5367 low-current, CMOS circuit that provides all of the required features for an ionization-type smoke detector.
This heat detector alarm electronic project is designed using the UM3561 sound generator circuit and some other common electronic parts . This heat detector circuit project uses a complementary pair comprising npn and pnp transistor to detect heat .
T3 and T4 transistors connected in darlington configuration are used to amplify the audio signal from the UM3561 ic .
This Smoke detector alarm circuit with is designed using RE46C140 and few external electronic components. The RE46C140 IC is a low power CMOS photoelectric type smoke detector circuit that will provide all the required features for a photoelectric type smoke detector project .