Alarm with NC sensors (CB25724E)

This alarm circuit with sensors in series was found in the Electronics Now magazine of June 1994. The circuit is powered according to the relay used.

| Clique na imagem para ampliar |

Band Pass Filter II (CB19688E)
This filter has a regulated source configuration. It can be implemented with almost any...
2 to 24 kHz Low Pass Filter 741 (CB16756E)
We found this filter configuration in an old documentation. It is one of many possible ones that...
Astable Triggered CMOS (CB10494E)
This circuit is from a 1998 Electronics Now and can be easily assembled since it uses a common...