Fire Sensor Alarm School Project Kit with Thermistor

    6946322342183

    Vendor: SmartLabs

    Out of stock
    R 72.00
    R 72.00
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    A thermistor changes its resistance as it warms up, and this circuit uses that to trip a buzzer when the temperature climbs. Hold something warm near the sensor and the alarm sounds.

    What is in the pack

    • Thermistor
    • Transistor
    • Buzzer
    • 2 x AA battery case
    • Assembly diagram guide

    Covers Electrical Systems and Control in CAPS Technology, Grade 9. Watch the transistor orientation when building, since the pack notes it has to go in with the rounded side facing the right way.

    Note: this is a component pack. The model, backing board, batteries, tools and glue are not included. Test it with warm air, not a flame.