and cathode pin of Led to collector of transistor. Connect Second end of Resistor to Positive Rail of Breadboard. Step-5: Take a led, Take 330ohm(330-10000hm) resistor.Connect led's ANODE pin to one end of resistor. Step-4:Connect Vcc pin of IR sensor to positive Rail ,Gnd pin to negative rail of breadboard.Connect Out pin of Sensor to base of the Transistor but in between base and Out pin of sensor connect resistance of value 10K.for this one end of resistance is connected to Base of transistor and second end of resistor is connected to OUT pin of sensor. Step-3: connect emiiter of transistor to ground or negative rail of breadboard where negative terminal of battery is connected. take a look at transistor and note which pin is base, emitter and collector pin. Step-2 : Take the NPN transistor and place it on the breadboard. Positive and negative rail are the topmost and bottommost row of Breadboard. Step1 : Connect positive terminal of battery to Positive Rail of BreadBoard and Negative terminal of battery to negative rail of breadboard.
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