Astable multivibrator or how to flash LED without microcomputer
Create a LED flasher. That is the easist circuit how to start electronics
The simple way is to use just one transitor.
Better, more comfortable flasher is with two transistors.
Try to change values of resistor and capacitor. You get various flashing time.
If you want to flash two LED alternate, you need to change the circui to
"astable flip-flop".
Integrated circuit known as 555 is very universel. It was createrd at start
of 80-years last century at Signetics company.
Today, the 555 circuit is produced by many companies. Try to use it.
With values changing of R1, R2 ad C2 get various flashing effects.
