Single Transistor LED Flasher Circuit | LED strobe

The circuit comprises a 12V battery (or 12V adaptor), timer IC NE555 (IC1), decade counter IC CD4017 (IC2), five BC548 transistors (T1 through T5), five sets of 5mm red, green, blue, white, and yellow LEDs each, and a Current few other components.

The quick answer is that a transistor can provide more current than an Arduino pinout. This makes the LED emit more light. There are complexities, however.

The LED Flasher circuit project here is based on NE555 timers. The timer is wired in astable mode which means that its output signal is a square wave oscillator. The 2 LEDs are connected in such a way that when one is ON other is OFF and vice versa.

The reason most mechanical flashers won't work with LEDs is that they require very little current flow, which is not enough to heat the internal strip and open the circuit diagram. There are several types of electronic flashers available, however, not all of them are for LED Set applications.

This transistor is commonly used for amplification of current as well as switching purposes. The gain value of the BC547 transistor ranges from 110 to 800, and this value determines the transistor's amplification capacity system.