This analog meter circuit was found in the September 1989 issue of Radio Electronics magazine. The source must be dual, and the table gives the resistors for the various scales.
This circuit can be used to excite push-pull steps of audio amplifiers. From an audio signal at...
This integrator circuit uses the junction FETs which can also be the BF245 or MPF102. The...
This circuit is from a Radio Electronics from September 1969. The integrated circuit used is one...