This counter was found in the November 19983 issue of Radio Electronics magazine. The power supply can be between 3 and 12 V typically. The counting speed depends on C1.
This circuit from a 1966 General Electric manual makes use of an SCS. The time is given by the...
The circuit shown in figure 8 is an application suggestion for ISL8107, a new integrated circuit from...
This four-digit circuit was found in a 1990 documentation. The sensor can be a contact or reed...