This integrated amplifier was found in a non-existent British magazine from 1975. The used integrated circuit is still popular and the mono bridged version can provide 36 W output power. 4 A.
This 4-20 mA current interface was found on a 90's EDN. The components used are not common today and...
This Radio Electronics circuit, in an 80's edition, decodes the 67 kHz signal used at the time to...
This sensitive circuit detects the live pole of a power grid or outlet. The circuit makes use of a high...