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Moisture Sensor Using Transistor

The moisture level is measured by inserting the two yellow probes into the soil. With wet soil, the ...
SKU: ELE-02386
Availability: 10 in stock
R136,85
:

Description

The moisture level is measured by inserting the two yellow probes into the soil. With wet soil, the probes will work as a short; thereby supplying a base current to the transistor which will allow current to flow from the collector to the emitter, switching the LED on. With dry soil there will be no current flowing, dry soil has a high resistance; therefore the transistor will not switch and the LED remains off.

Level of this kit is easy.

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