Based on an integrated circuit of the time, this circuit appeared in the October 1979 issue of Radio Electronics magazine. The circuit monitors voltages in the range of 10.5 to 16.0 V.
We found this circuit in a 2005 Linear Technology manual. The circuit makes use of the LT6101 and...
We found this circuit in a documentation for radio amateurs from 1975. The FET can be the BF245 and...
This circuit is from 1985 documentation. The integrated circuit is not very common today, but...