Found in a 1967 General Electric SCR manual, this circuit can be used to protect a load by switching in case of excess current. R1 determines the trigger current.
This low-pass filter with 741 op and symmetrical source was found in the August 1993 issue of...
This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with...
This circuit allows you to modify the resolution of a measurement bridge. It was found in the...