Monostable with the 4001 (CB25119E)

This two-port monostable of the 4001 was suggested by an article in the April 1988 Radio Electronics magazine. The timings are given by C1 and R1.

| Clique na imagem para ampliar |

European Emergency Siren 555 (CB25520E)
This circuit appears in several versions in publications of the time and can be modified by...
Conductivity Meter (CB13503E)
This circuit measures the conductivity of a saline solution, which is affected by the electrolysis effect....
Vacuum Gauge (CB26175E)
This two-digit digital pressure gauge was found in the 1992 special edition of Radio Electronics...