Found in a 90’s HAM Radio, this circuit is used for an optical communications system or even audio transmission by optical fiber. The components are common.
This shield can be controlled by positive or negative voltages of the sensor acting as a...
This circuit is from a 1980s Signetics documentation. Equivalent operational amplifiers may be...
This circuit was found in an Electronics World of 1969. Transistors are general-purpose types. It...