We found this circuit in the March 1992 Radio Electronics magazine. The circuit provides 100 Hz for each degree Celsius or Fahrenheit.
This circuito from the 1977 GE Semiconductor Manual circuit provides timings from 0 to 90 seconds...
Found in American documentation from the 1990s, this TTL circuit operates at frequencies typically up...
The used diode is an unusual component today. We found this 12 V regulator in documentation from the...