Lead Acid Battery Charger (CB26301E)

This power charger was found in a 1990s issue of Popular Electronics. Integrated circuits must be equipped with a heat sink.

| Clique na imagem para ampliar |

Light interrupt pulse generator (CB4943E)
This circuit generates a pulse of duration determined by the capacitor when an object interrupts the...
Electronic Buzzer (CB16242E)
The circuit found in a 1983 publication is shown in the figure. Taking advantage of the...
10 kHz Salen Key Filter (CB5193E)
This low-pass filter was found in an American publication from the 80's. The circuit uses an...