This circuit was found in a Popular Electronics from the 90s. The transistors are general purpose, and the gain depends on the ratio between R2 and R1.
This circuit was found in a 2005 Linear Technology manual. It senses the two-way current,...
This circuit for cars with fans was found in Silicon Chips documentation from the 90s. It is used...
This voltage regulator step can be used for a variable source from 0 to 30 V with a maximum output...