In the first circuit a flasher circuit in series with a 220 ohm resistor turns on a power transistor.
Transistor flasher circuit diagram.
This led flasher circuit is very easy and simple and there is no ic used.
We can create a dancing led circuit by combining many similar circuits which we can use for advertisement boards.
The circuit is using single transistor as driver which is taking flash rate from the led 2 which is a self flashing led.
Use 9v or 12v battery or adaptor for this circuit.
This circuit can be operated using dc 6 12v supply.
Here is a one transistor led flasher circuit which will flash a super bright led.
In the second circuit a power fet is used in place of the npn.
Power transistors may be added for handling higher current loads.
1 in above circuit can the blinker time be adjusted like on for 1sec and off for 1 sec.
If you want one a lamp flasher circuit using transistors that flashing for general to use.
And instead of led how can i connect transistor which can act as a switch the transistor switch will be on for 1sec and off for 1sec 2 the circuit diagram is shown in the link below.
Circuit diagram blinking led circuit.
Which it has highlights is there are two types of transistor are npn and pnp.
The transistors do not necessarily have to be bc547 you may use 2n2222 or similar small signal transistors but it is recommended to always use the equivalent transistors.
Can be used on roads for signaling purposes.
I have many ways but today you see this three of the lamp flasher circuits.
This circuit basically works on the charging and discharging of capacitors.
Both npn transistor you can use of bc547 548 or 2n2222.
The two circuits below are typical connections.