This circuit can detect static charges or extremely low voltages. The circuit was found in ancient American documentation and makes use of a JFET. A BF245 which is a more modern transistor can be used.
The operational used in this common configuration is a double 741. The circuit can be used to...
The two-channel mixer shown in the figure is the ideal solution for cases where we need an...
This circuit is from an English publication from 1965. The transistors used are rare, however, they...