This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are current and the transistor is of general use.
Found in a 1965 General Electric Hobby Manual, this timer was originally created to operate with...
Found in a 90’s Radio Electronics magazine, this circuit uses a component from the time, difficult...
Only one LED is turned on when S1 and S2 are pressed. The LED that will be on is just the...