This game was found in Radio Electronics from the 90s. The components used are common except some that are from that time and that can no longer be found easily.
This second-order low-pass Salen-Key filter was obtained from an American 1980s documentation. Formulas...
This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s...
This circuit was published in the July 1993 issue of Electronics Now magazine. It uses a sensor from...