This TTL sequential flasher circuit was found in the January 1981 issue of Radio Electronics magazine. It is powered by 5 V. The frequency can be adjusted by R1.
The integrated circuit used in this application is not currently common. However, it can be...
We found this simple gain-50 current sensing circuit in a 2005 Linear Technology publication. The circuit...
This circuit was obtained in a publication in 1980. It is the traditional configuration of astable...