This circuit was found in a 1991 PE Hobbyst Handbook. The components are still common and each note has an individual adjustment.
This amplifier uses the LM358, this operational amplifier with excelents characteristics for this...
This circuit for analog video signals was obtained from a Linear Technology documentation from the 1990s. The...
Obtained from a 1980s Linear Technology documentation, this circuit has a hysteresis of less than...