Found in a 1990 PE Hobbyst, this 4-digit circuit has a high response speed. The circuit is based on TTL logic.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This simple optical alarm circuit was found in the 1991 Electronics Experimenter Handbook. The...
This simple 5.6 V regulator circuit was found in a 1966’s Philips. The zener can be changed to...