Alarm siren (CB26231E)

This circuit with two 555s was found in the Encyclopedia of Electronic Circuits volume 5 of 1995. The power is high due to the use of 2N3055.

| Clique na imagem para ampliar |

AC SCR Fast Switch (CB13898E)
This circuit switches a load in 0.013 ms after closing the switch and after the start of each...
Continuity Test (CB22130E)
This circuit can be powered by 2 or 3 small batteries. The resistor can have values between 220...
Dynamic Load (CB1499E)
The purpose of this circuit is to test power supplies functioning as a variable load that can...