This high-impedance headphone circuit was found in a 1990s William Sheets. The power is low, but the high input impedance makes it useful for radio applications.
This double-T sine wave oscillator uses a CA39035, an integrated circuit released by RCA at the...
The integrated circuit MC1408 / MC1508, consists of an 8-bit digital / analog converter from...
This circuit, which can act as a shield, was found in an American documentation from the 90s. The...