Neon Transistor Indicator (CB6696E)

Found in ancient documentation, this circuit uses a high voltage transistor of the time. Observe the supply voltage of the neon lamp used.

| Clique na imagem para ampliar |

Second Order High Pass Filter (CB12573E)
The configuration shown in the figure is a second order filter (12 dB per octave) with an...
FM AC Transmitter (CB20347E)
This transmitter, indicated for espionage applications, is permanently powered by the power grid....
SCR Incandescent Indicator (CB14902E)
This circuit was obtained in an old French publication from the 80s. The maximum power of the lamp...