This circuit generates signals for adjustments in FIs of 10.7 MHz. The transistors can be BC548 or equivalent. We found this configuration in a documentation from the 70s.
This circuit sounds when the input voltage drops below the value determined by the zener. The...
This current control for DC motors was found in documentation from the 1970s. The current depends on...
Found in an Electronic Design from the 90s, this sophisticated continuity tester uses operational...