Transistor Flasher Circuit

Led blinking using transistor bc547.

Transistor flasher circuit.

The circuit contains two transistors. But the supply voltage not be less than 9v otherwise the circuit might fail to work correctly. R1 2k7 r2 100 ohms t1 bc 547 c1 100 uf to 470 uf. Circuit diagram of led flasher blinker.

Both npn transistor you can use of bc547 548 or 2n2222. When we power up the circuit the led blinks continuously. The resistor r and capacitor c determines the timing of the flasher and the period is proportional to r c. This two transistor led flasher circuit is easy to build.

Simple blinking led circuit. In the second circuit a power fet is used in place of the npn. Circuit diagram blinking led circuit. This led flasher circuit is very easy and simple and there is no ic used.

Three different ways to build a blinking led circuit. This circuit can be operated using dc 6 12v supply. The two circuits below are typical connections. We can create a dancing led circuit by combining many similar circuits which we can use for advertisement boards.

The blinking led circuit is like the electronics version of the hello world program. The circuit is built using transistors resistors capacitors and leds. It s a simple electronic circuit that gives you a visual cue if it works. The flashing rate could be varied either by changing the value of r1 or c1 or both together.

So follow every step and learn about how to make your own led blinking circuit. Use 9v or 12v battery or adaptor for this circuit. Parts list for the proposed single transistor led flasher circuit. The goal is to make a light emitting diode led blink.

In the first circuit a flasher circuit in series with a 220 ohm resistor turns on a power transistor. Power transistors may be added for handling higher current loads. Of course you will need a breadboard wire jumpers and a power source. 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.

These types of circuits are useful when we need a decoration in our homes or in our hobbies like we used to make a little home from scrapes and. Figure 14 shows the practical circuit of a transistor two led flasher which can be converted to single led operation by simply replacing the unwanted led with a short circuit. A two led flasher is a simple modification of this circuit but is arranged so that one led switches on when the other switches off or vice versa. This circuit basically works on the charging and discharging of capacitors.

It was the first circuit i ever built and it felt great. Led flash for alerts. Led any type any color. Flashing led circuit aka blinking led circuit is one of the simple circuits to make in electronics projects that demonstrate the viewer about the working of transistors in switching state.

A very simple circuit that you can build to blink or flash leds.