This circuit uses a CMOS integrated circuit as a basic element and can be combined with the previous circuits. The circuit is from a Radio Electronics from May 1990.
This general-purpose transistor amplifier stage was found in the November 1993 issue of...
This conventional 4 channel circuit with the 4017 and 555 was found in the November 1991 Radio...
We find this circuit in an old technical documentation. The circuit can be drawn up with other...