Found in a 1965 Electronic Design, this high voltage circuit uses period transistors. Its purpose was to excite Nixie display tubes common at the time.
This circuit was found in Motorola documentation from 1966. The lamps are according to power and...
This circuit, which uses components still common today, was found in a 1997 documentation. It...
This circuit is intended to apply the music signal from a stereo to a telephone line for the...