Npn Transistor Flasher Circuit

The flashing rate could be varied either by changing the value of r1 or c1 or both together.

Npn transistor flasher circuit. Led flashing start by a specific interval. Ask question asked 3 years 11 months ago. Viewed 3k times 0 begingroup i implemented this circuit on a breadboard and it works. This circuit can be operated using dc 6 12v supply.

The resistor r and capacitor c determines the timing of the flasher and the period is proportional to r c. We call it astable multivibrator. Use 9v or 12v battery or adaptor for this circuit. Active 3 years 11 months ago.

Parts list for the proposed single transistor led flasher circuit. This interval can be varied by varying the value of the capacitor. Blinking 2 led circuit using npn transistors. Circuit diagram blinking led circuit.

2 piece of timer ic555. But the supply voltage not be less than 9v otherwise the circuit might fail to work correctly. How to make simple led flasher using transistor follow us on. R1 2k7 r2 100 ohms t1 bc 547 c1 100 uf to 470 uf.

Components for the circuit. Understand 2 transistors npn pnp flasher circuit working. This circuit basically works on the charging and discharging of capacitors. Both npn transistor you can use of bc547 548 or 2n2222.

This circuit contains both npn and pnp transistors. The combination of resistors and capacitors determines the timing of the flasher and the time duration is proportional to r x c. The above circuit uses a combination of bc 557 and bc 547 transistors in such a way that bc 547 npn transistor conducts for a very brief time making the led light. After making a circuit connect 9v battery to the circuits.

This circuit uses a bc557 pnp transistor connected to a bc547 npn transistor in such a way so that the bc547 conducts for a very brief time making the led light. 2 piece of 1m 1000k resistor. Led any type any color. Often we know it 2 led flasher circuit in this we use pnp transistor.

There are many circuits here is one of the blinking circuits. But now we use 2 npn transistor. Police style strobe light circuit is operating using 555 ics and these ics can operate a limited amp and current. So to add more than 8 leds you should use transistor to control the power other wise your ics may damaged.

This led flasher circuit is very easy and simple and there is no ic used. I like blinking 2 led circuit using npn transistors.