This experimental circuit with Nixie tube was found in the Radio Electronics magazine of March 1969. The circuit serves for demonstrations and also for testing these digital indicator tubes.
Two operational are used on this triangular-rectangular oscillator suggested by Motorola in its...
Found in Linear Technology documentation from the 90s, this circuit uses an operational amplifier...
This simple two-transistor circuit used transistors from the 60s, having been found in a...