Indicated for checking the operation of small FM transmitters, this circuit was found in an Australian publication from 1991. The components are all common nowadays.
This alarm, found in a 2002 documentation, uses several sensors and has a 12 V supply, not...
This circuit was found in a 90's EDN. The circuit provides two 15 V outputs and one 5 V output...
This circuit generates 5 different tones selectable by switch S1. Separate pressure switches can...