An article in Radio Electronics magazine from November 1958 showed the construction of this tube audio oscillator. Note the use of lamps as a stabilizer to obtain better sinusoidal signals.
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...