This 5V power supply with a 1.5 to 3 A current was found in Maxim documentation from the 90s. The integrated circuit is the MAX741D.
This sound effect circuit uses only one integrated. We found it in a 90's EDN. The effects can be...
This circuit was suggested in an article in Radio Electronics magazine in January 1992. Other...
The bipolar transistors can be the BC548 and the FET a BF245. This configuration has a time...