This circuit responds to frequencies from 100 Hz to 3 MHz. We find it in a 90s Radio Electronics. Transistors are general purpose types.
This circuit indicates a digital value through a moving bar. The circuit is TTL and must be...
This circuit was found in an Electronic Engineering of the 80s. The circuit indicates when a...
This configuration is from an old Motorola publication from the 70s. In it we have the way to...