Found in a 90s Electronic Design, this circuit is used with a 9 V adapter for powering small circuits. The maximum current is given by the 250-mW regulator.
Found in American documentation from the 1980s, this circuit can be designed with equivalent...
The 4028 CMOS IC not only contains the complete decade counter, but also the 7-segment decoder...
We found this circuit in an American 1980s documentation. The circuit can be assembled with modern...