Transistor Flasher Schematic

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

Transistor flasher schematic.

But the supply voltage not be less than 9v otherwise the circuit might fail to work correctly. Use 9v or 12v battery or adaptor for this circuit. Cree white led matrix xls. Which be the circuit that is simple but at this time a friend someone complain to come to that want the circuit that use the transistor.

Parts list for the proposed single transistor led flasher circuit. 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. I selected a cree device cree is well known for ultrabright white leds. Cree white led matrix copied from the digikey search engine and edited numerous devices are available.

Key to the brightness is the led. This led flasher circuit is very easy and simple and there is no ic used. Both npn transistor you can use of bc547 548 or 2n2222. Can be used on roads for signaling purposes.

In the first circuit a flasher circuit in series with a 220 ohm resistor turns on a power transistor. Lamp flasher circuit using 2n2907 bipolar transistor i has evered to play the leading role lamp flasher circuit with the integrated circuit. We can create a dancing led circuit by combining many similar circuits which we can use for advertisement boards. This circuit can be operated using dc 6 12v supply.

In the second circuit a power fet is used in place of the npn. This circuit basically works on the charging and discharging of capacitors. R1 2k7 r2 100 ohms t1 bc 547 c1 100 uf to 470 uf. Circuit diagram blinking led circuit.