Light Dependent Resistor LDR controlled 2N3904 NPN bipolar junction transistor BJT switch circuit

It’s really easy to control a NPN bipolar junction transistor (BJT) switch circuit with a light dependent resistor (LDR). The LDR and a fixed resistor form a voltage divider, whose voltage is applied to the base of the NPN BJT.

Light dependent resistor LDR controlled 2N3904 transistor switch circuit electronics photoresistor

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Light Dependent Resistor LDR controlled LED intensity and 2N2222 NPN BJT on off switch circuits diagram by electronzap electronzapdotcom
Light Dependent Resistor LDR controlled LED intensity and 2N2222 NPN BJT on off switch circuits diagram by electronzap electronzapdotcom


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