This circuit indicates when a 28 V lamp burns, lighting a neon lamp with higher voltage. The circuit is from 1969 documentation.
The maximum frequency of this oscillator, in the case of 100 kHz, depends on the operational used....
With the indicated components, this circuit oscillates around 3.6 kHz. The components can be...
This circuit for analog TV was found in a 90s EDN. The integrated circuits used are from that time...