This circuit for analog TV was found in an American documentation from the 90s. The circuit uses an unusual power transistor today.
This is a common crystal oscillator configuration with 80s transistors. The circuit has the...
This CMOS integrated alarm was found in the July 1992 Radio Electronics magazine. The circuit has...
This circuit was found in an Electronics World of 1966. It has a range of 5 to 25 000 Hz at 1 dB...