This high voltage circuit was found in a 1970 documentation. The integrated one is of the time and modern equivalents can be tested. The resistors of the voltage reducing system must be calculated.
Found in Popular Electronics, this configuration can be powered by voltages from 6 to 12 V....
This symmetrical power supply uses regulators from the 78xx and 79xx series and can be adapted to supply...
This monostable circuit uses one of the two flip-flops available on the CMOS 4098 integrated...