The circuit shown in the figure generates a rectangular signal that depends on R and C, when its input goes to the high level.
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...