This circuit was found in the December 1977 issue of Radio Electronics magazine. The 4-digit circuit is based on TTL logic and must be powered by a voltage of 5 V.
Found in 1967 General Electric documentation this circuit uses a PUT and a diac to generate 1 kHz...
We found this circuit in documentation from Linear Technology of the 80s. The circuit uses...
This 800 Hz sinusoidal oscillator was found in a 1970s American documentation. The transistor...