Alarm Buzzer (CB24392E)

This circuit was found in July 1975 Radio Electronics magazine. Power depends on the trigger transistor and the effects of capacitors C1 and C2.

| Clique na imagem para ampliar |

5 V x 3 A Regulator (CB19128E)
The power transistor of this circuit can also be the TIP42 mounted on a good heat sink. The...
Limit alarm (CB9582E)
Using a window comparator, this circuit trips over a certain range of input voltages. Formulas for...
Time Control Timer (CB4964E)
This timer circuit was found in a 1980s documentation. The integrated circuit is the 555, which...