Here is a circuit called LED chaser that I found the other day. I watched some videos on Youtube and saw that its function is to blink the LEDs in some kind of sequence:
But I don't fully understand what the circuit does or how it works. In the video the LEDs seem to blink in groups in somewhat random order (this could be cool for a disco light application). Is this the function of the circuit?
I also have a hard time getting my head around how this circuit works. There are the sections that consist of an LED with a series resistor, a transistor, and a capacitor. These sections are connected together with some kind of biasing resistors (?) going into the bases of the transistors. Then finally the collector of the transistor at the final section is connected back to the base of the first transistor as well as to the ground. But how do these sections work? I just see the transistors turning on when the circuit is powered, conducting current, lighting the LEDs.. Then the capacitors do something and I just get confused.
Help will be much appreciated! Googling hasn't produced any explanations.