This circuit was found in a PE Hobbyst Handbook of 1989. It uses a black light fluorescent of the time. Small fluorescent black light from 1 to 4 W can be used.
For a negative voltage of -48 V, this circuit from the 2005 Linear Technology manual makes use of an...
Found in a 1980s telecommunications documentation, this balanced modulator circuit uses...
This circuit is from a 2005 Linear Technology publication. It converts current into load sensing...