567 Tone Decoder (CB25787E)

We found this circuit in the December 1994 Electronics Now magazine. The worthless components are frequency dependent.

| Clique na imagem para ampliar |

12 V Battery Charger (CB13013E)
The battery charger suggested in the figure has its current limited by resistor R1. This component can...
120 VAC x 120 W Inverter (CB7261E)
Suggested by a 1968 Motorola power semiconductor manual, this circuit uses a special transformer and...
Liquid Level Detector (CB19922E)
This circuit is used to detect the water level in a reservoir. It triggers the charge when the...