The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale limit. The circuit can use other types of warning.
We found this transformer-isolated control circuit in a June 1995 Electronics Now. The triac must...
This TTL circuit for PC was found in an English documentation from 1992. The integrated circuit used...
We found this circuit in a Popular Electronics from the 90's. The circuit uses three SCRs to...