This circuit indicates when a 28 V lamp burns, lighting a neon lamp with higher voltage. The circuit is from 1969 documentation.
In the figure we have the basic configuration for interfacing TTL logic with CMOS logic. The...
We found this circuit in a 1979 French publication, but it can still be assembled today with...
This circuit can be used on audio, video, or data links to receive modulated infrared signals. The gain is...