The purpose of this 1967 Philips circuit is to produce a rectangular signal from a sharp pulse. The circuit makes use of an unusual component today as a base.
Found in a PE Hobbyst Handbook of 1991, this circuit was originally proposed to time photographic...
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...
This circuit with a double-gate MOS transistor was found in a Popular Electronics from the 90's....