This sensitive motion sensor with inductive sensor was found in a 90s Elektor. The circuit uses only transistors to activate a buzzer.
This circuit causes the relay to be energized when the input voltage exceeds the voltage value of...
Found in an Electronic Design from the 90s, this circuit generates a mathematical function given by the...
Found in documentation from the 1980s, this circuit uses a SG1524. It is an uncommon integrated circuit...