Led Transistor Schaltung. The circuit described in this video shows how an npn transistor can be used to switch on an led. Schaltung 2 led schalter mit einem transistor eine led verhält sich anders wie eine glühbirne eine led leuchtet erst ab einer bestimmten spannung.
With the npn transistor in the circuit amplification is usually to the degree of about 100 to 150. In this circuit diagram all leds blink as a moving in one direction. In the following circuit vcc 5v main supply voltage red wires and vgpio 3 3v representing the gpio output bottom blue wire is connected to the transistor base through r2 560ohm resistor.
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How to make simple led flasher using transistorfollow us on website. Yard sale free on youtube2. When the inverter input is 12v the transistor in the first inverter will turn on and the led will come on and the inverter output voltage will be 0 2v. So you see how the transistor allows a circuit to be an led driver.
