Found in a 90s Popular Electronics, this circuit can power a miniature railroad with voltages of 15 V and currents up to 1 A. The circuit has soft start effects.
Found in a 1970's Radio Electronics, this circuit uses a triac to switch loads on the AC network. This...
This circuit uses a diode as a radiation sensor. The operational ones are old because the...
This 1969 circuit generates a high voltage that reaches 100 V from 16 V. The power is of the order...