Blinking Led Circuit Transistor. Resistor value 470 ohms qty. First the pnp transistor get activated and led goes to glow and the npn transistor drives the voltage to on pnp transistor.
You can also apply 12v dc without any problem. This simple led flasher blinker circuit made by using two npn bc547 transistor and some resistors and capacitors. When we power up the circuit the led blinks continuously.
Also note that you may need more than 9v voltage for this to get working on most transistors.
The parts list includes. This simple led flasher blinker circuit made by using two npn bc547 transistor and some resistors and capacitors. The circuit actually exploits the negative resistance factor in transistors to produce the blinking effect. Resistor value 470 ohms qty.
