30 to 40 kHz neon oscillator (CB8137E)

Found in American documentation from 1969, this circuit produces a pulsating waveform being powered by a high voltage. Neon can be equivalent.

Third Brake Light (CB4783E)
This circuit was found in a Popular Electronics of the 90s. It operates a third brake light that...
HV9805 High Voltage LED Driver (COM124E)
September 2015 – It can be found at Mouser Electronics the new drivers of high voltage LEDs HV9805 from...
Transistor RIAA Preamplifier (CB1372E)
We found this circuit in documentation from the 1970s; The circuit uses Japanese transistors of...