4069 Positive Triggering Flip Flop (CB19934E)

In the figure we have the way to control a flip-flop with the 4069 from positive pulses. The circuit can be used as a shield, if powered by 5 V.

| Clique na imagem para ampliar |

Carbon Microphone Preamplifier (CB14801E)
Carbon microphones are no longer used in most projects. However, finding one in the scrap metal, it...
Sonic Repellent for Animals (CB13162E)
This circuit produces a strong tone of audio or ultrasound, depending on the values of components C1 and...
Alarm (CB12604E)
This alarm from an old 1978 publication uses PNP transistors and driver and output transformers that are...