We found this circuit in a Japanese 1968’s documentation. The circuit makes use of transistors from that country common at the time of publication. Observe the symmetrical power supply for the circuit.
This TTL oscillator uses a ceramic resonator as a frequency fixing element. The resonator is found...
This analog meter circuit was found in the September 1989 issue of Radio Electronics magazine. The source...
This circuit was found in a Popular Electronics of the 90s. The resistor R4 determines the load...