The used diode is an unusual component today. We found this 12 V regulator in documentation from the 90s.
This circuit was found in an Elektor from the 90s. The integrated circuit is uncommon today. This...
This two input simple mixer uses two transistor and can b e upgraded to more inputs. Input...
This 100 kHz crystal oscillator uses 7404 to generate square signals. We found it in a Popular...