This TTL circuit has a well-known configuration, having been found in a Radio Electronics magazine from December 1980. The power supply must be 5 V.
The LM100 integrated circuit is quite old, still of a metallic enclosure type. The circuit shown in...
Found in an Electronic Design from the 90s, this circuit makes use of components from the time. The...
This circuit is from an Italian magazine of 1983, but it can be assembled with the most modern...