This is the conventional astable configuration of the 555 integrated circuit already explored in many other articles on this site. The circuit can operate with voltages from 5 to 15 V and as a shield it can be controlled by pin 4.

This is the conventional astable configuration of the 555 integrated circuit already explored in many other articles on this site. The circuit can operate with voltages from 5 to 15 V and as a shield it can be controlled by pin 4.