Transistor Flasher Schematic

The two circuits below are typical connections.

Transistor flasher schematic.

Cree white led matrix copied from the digikey search engine and edited numerous devices are available. This circuit can be operated using dc 6 12v supply. 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. Power transistors may be added for handling higher current loads.

In the second circuit a power fet is used in place of the npn. Use 9v or 12v battery or adaptor for this circuit. Cree white led matrix xls. Circuit diagram blinking led circuit.

This circuit basically works on the charging and discharging of capacitors. Can be used on roads for signaling purposes. But the supply voltage not be less than 9v otherwise the circuit might fail to work correctly. We can create a dancing led circuit by combining many similar circuits which we can use for advertisement boards.

Lamp flasher circuit using 2n2907 bipolar transistor i has evered to play the leading role lamp flasher circuit with the integrated circuit. Led any type any color. R1 2k7 r2 100 ohms t1 bc 547 c1 100 uf to 470 uf. Parts list for the proposed single transistor led flasher circuit.

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. I selected a cree device cree is well known for ultrabright white leds. Both npn transistor you can use of bc547 548 or 2n2222. The flashing rate could be varied either by changing the value of r1 or c1 or both together.