This circuit was found in a 2005 Linear Technology component manual. The circuit is full bridge and can operate on bridges up to 75 V. The circuit power is 5 V which allows its use as a shield.
Found in a Popular Electronics from the 80's, this circuit triggers an SCR keeping an LED on when...
This circuit was found in a 1994 documentation. Speed measurement pulses are obtained by a reed...
I found this Vox circuit or acoustic receiver as it was originally called, in a 1973 publication. The...