Neon high voltage regulator (CB8804E)

Found in a1969’s neon lamp documentation, this circuit uses a high voltage transistor. The output currents reach 100 mA.

| Clique na imagem para ampliar |

Telegraphic Oscillator with Visual Indication (CB16279E)
This oscillator for the practice of telegraphy provides a good sound in a loudspeaker, with only...
40 kHz repellent (CB20815E)
This ultrasonic insect repellent was found in American documentation from the 1980s. The...
Experimental Telegraph LM3909 (CB14287E)
The short-wired circuit is suggested by National Semiconductor in documentation on the LM3909. The power...