Crystal Pierce Oscillator (CB6149E)

This circuit uses a 100 kHz crystal, but nearby frequencies can be obtained with appropriate crystals. Components are still common today.

| Clique na imagem para ampliar |

Electric fence (CB6231E)
This circuit was found in an American 80's circuit board. The components used are current except the...
BA1404 FM Stereo Transmitter (CB25473E)
Based on the BA1404 integrated circuit, this circuit was found in the July 1992 issue of Radio...
40 uA Shield (CB25633E)
This circuit needs only 0.7 V at 40 uA to drive the relay. We found it in the November 1993...